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100 results found for "conjugate-sides" in Class 10.

किस विकल्प में अपरिमेय संख्या को परिमेय संख्या में बदलने के लिए सही संयुग्मी चुना गया है?

In which option is the correct conjugate chosen to rationalize an irrational denominator?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{5+\sqrt{2}}\) के लिए \(5-\sqrt{2}\)For \(\frac{1}{5+\sqrt{2}}\) use \(5-\sqrt{2}\)

Step 1

Concept

The conjugate of \(5+\sqrt{2}\) is \(5-\sqrt{2}\). In exams changing the middle sign is the key idea of a conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{1}{5+\sqrt{2}}\) के लिए \(5-\sqrt{2}\) / For \(\frac{1}{5+\sqrt{2}}\) use \(5-\sqrt{2}\). The conjugate of \(5+\sqrt{2}\) is \(5-\sqrt{2}\). In exams changing the middle sign is the key idea of a conjugate.

Step 3

Exam Tip

\(5+\sqrt{2}\) का संयुग्मी \(5-\sqrt{2}\) है। परीक्षा में बीच का चिन्ह बदलना ही संयुग्मी बनाने की मुख्य बात है।

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चित्र के दोनों ओर समान आकार और रंग हों तो कौन सा संतुलन बनता है?

What balance is created when both sides of a picture have similar shapes and colours?

Explanation opens after your attempt
Correct Answer

A. सममित संतुलनSymmetrical balance

Step 1

Concept

Similarity on both sides creates symmetrical balance. Exam tip: write mirror balance as symmetrical.

Step 2

Why this answer is correct

The correct answer is A. सममित संतुलन / Symmetrical balance. Similarity on both sides creates symmetrical balance. Exam tip: write mirror balance as symmetrical.

Step 3

Exam Tip

दोनों ओर समानता सममित संतुलन बनाती है। परीक्षा में दर्पण जैसे संतुलन को सममित लिखें।

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चार बराबर भुजाओं वाला नियमित आकार कौन सा है?

Which regular shape has four equal sides?

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Correct Answer

B. वर्गSquare

Step 1

Concept

A square has four equal sides. Exam tip: remember square for equal sides.

Step 2

Why this answer is correct

The correct answer is B. वर्ग / Square. A square has four equal sides. Exam tip: remember square for equal sides.

Step 3

Exam Tip

वर्ग में चार बराबर भुजाएं होती हैं। परीक्षा में equal sides के लिए square याद रखें।

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तीन भुजाओं वाला आकार कौन सा है?

Which shape has three sides?

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Correct Answer

A. त्रिभुजTriangle

Step 1

Concept

A triangle has three sides. Exam tip: connect three sides with triangle.

Step 2

Why this answer is correct

The correct answer is A. त्रिभुज / Triangle. A triangle has three sides. Exam tip: connect three sides with triangle.

Step 3

Exam Tip

त्रिभुज में तीन भुजाएं होती हैं। परीक्षा में three sides को triangle से जोड़ें।

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यदि \(\alpha+\beta=18\) और \(\alpha\beta=74\), तो कौन सा संयुग्मी अपरिमेय युग्म संभव है?

If \(\alpha+\beta=18\) and \(\alpha\beta=74\), which conjugate irrational pair is possible?

Explanation opens after your attempt
Correct Answer

A. \(9+\sqrt{7}\) और \(9-\sqrt{7}\)\(9+\sqrt{7}\) and \(9-\sqrt{7}\)

Step 1

Concept

The sum of \(9+\sqrt{7}\) and \(9-\sqrt{7}\) is (18), and the product is (81-7=74). In exams check both sum and product of options.

Step 2

Why this answer is correct

The correct answer is A. \(9+\sqrt{7}\) और \(9-\sqrt{7}\) / \(9+\sqrt{7}\) and \(9-\sqrt{7}\). The sum of \(9+\sqrt{7}\) and \(9-\sqrt{7}\) is (18), and the product is (81-7=74). In exams check both sum and product of options.

Step 3

Exam Tip

\(9+\sqrt{7}\) और \(9-\sqrt{7}\) का योग (18) और गुणनफल (81-7=74) है। परीक्षा में विकल्पों का योग और गुणनफल दोनों जांचें।

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यदि \(\alpha+\beta=10\) और \(\alpha\beta=21\), तो कौन सा संयुग्मी अपरिमेय युग्म संभव है?

If \(\alpha+\beta=10\) and \(\alpha\beta=21\), which conjugate irrational pair is possible?

Explanation opens after your attempt
Correct Answer

B. \(5+\sqrt{5}\) और \(5-\sqrt{5}\)\(5+\sqrt{5}\) and \(5-\sqrt{5}\)

Step 1

Concept

The pair \(5+\sqrt{5}\) and \(5-\sqrt{5}\) has sum (10) and product (20) so it also fails. The pair (5+2) and (5-2) would be rational so none of the given options fits.

Step 2

Why this answer is correct

The correct answer is B. \(5+\sqrt{5}\) और \(5-\sqrt{5}\) / \(5+\sqrt{5}\) and \(5-\sqrt{5}\). The pair \(5+\sqrt{5}\) and \(5-\sqrt{5}\) has sum (10) and product (20) so it also fails. The pair (5+2) and (5-2) would be rational so none of the given options fits.

Step 3

Exam Tip

\(5+\sqrt{5}\) और \(5-\sqrt{5}\) का योग (10) और गुणनफल (25-5=20) है इसलिए यह भी नहीं है। सही युग्म (5+2) और (5-2) परिमेय होगा इसलिए दिए विकल्पों में कोई नहीं।

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किस विकल्प में दिया बहुपद परिमेय गुणांकों वाला है और उसके शून्यक अपरिमेय संयुग्मी हैं?

Which option gives a polynomial with rational coefficients and irrational conjugate zeroes?

Explanation opens after your attempt
Correct Answer

A. \(x^2-6x+7\)

Step 1

Concept

For \(x^2-6x+7\), (D=36-28=8). The coefficients are rational and the zeroes are \(3\pm\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-6x+7\). For \(x^2-6x+7\), (D=36-28=8). The coefficients are rational and the zeroes are \(3\pm\sqrt{2}\).

Step 3

Exam Tip

\(x^2-6x+7\) में (D=36-28=8) है। गुणांक परिमेय हैं और शून्यक \(3\pm\sqrt{2}\) होंगे।

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यदि दोनों ओर समान आकार हैं पर एक ओर बहुत गहरा रंग है तो संतुलन पर क्या असर होगा?

If both sides have same shapes but one side has very dark colour what happens to balance?

Explanation opens after your attempt
Correct Answer

D. दृश्य भार असमान हो सकता हैVisual weight can become unequal

Step 1

Concept

Dark value can increase visual weight. Exam tip: observe value along with size in balance.

Step 2

Why this answer is correct

The correct answer is D. दृश्य भार असमान हो सकता है / Visual weight can become unequal. Dark value can increase visual weight. Exam tip: observe value along with size in balance.

Step 3

Exam Tip

गहरा मान दृश्य भार बढ़ा सकता है। परीक्षा में संतुलन में आकार के साथ मान भी देखें।

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यदि दोनों ओर समान आकार हैं पर एक ओर बहुत गहरा मान है तो क्या होगा?

If both sides have same shapes but one side has very dark value what happens?

Explanation opens after your attempt
Correct Answer

A. दृश्य भार असमान हो सकता हैVisual weight can become unequal

Step 1

Concept

Value changes visual weight. Exam tip: observe value along with size in balance.

Step 2

Why this answer is correct

The correct answer is A. दृश्य भार असमान हो सकता है / Visual weight can become unequal. Value changes visual weight. Exam tip: observe value along with size in balance.

Step 3

Exam Tip

मान दृश्य भार को बदल देता है। परीक्षा में संतुलन में size के साथ value भी देखें।

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यदि दोनों ओर समान आकार हैं पर एक ओर रंग बहुत गहरा है तो सममिति पर क्या असर होगा?

If both sides have same shapes but one side has very dark colour what happens to symmetry?

Explanation opens after your attempt
Correct Answer

A. दृश्य भार असमान हो सकता हैVisual weight may become unequal

Step 1

Concept

Value can change weight despite symmetrical shapes. Exam tip: observe value balance in symmetry.

Step 2

Why this answer is correct

The correct answer is A. दृश्य भार असमान हो सकता है / Visual weight may become unequal. Value can change weight despite symmetrical shapes. Exam tip: observe value balance in symmetry.

Step 3

Exam Tip

सममित आकार के बावजूद मान भार बदल सकता है। परीक्षा में symmetry में value balance देखें।

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असममित संतुलन में दोनों ओर समानता न होने पर भी संतुलन कैसे बनता है?

How is balance formed in asymmetrical balance even when both sides are not identical?

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Correct Answer

A. अलग तत्वों के दृश्य भार सेThrough visual weight of different elements

Step 1

Concept

In asymmetrical balance visual weight is kept equal. Exam tip: remember different but balanced.

Step 2

Why this answer is correct

The correct answer is A. अलग तत्वों के दृश्य भार से / Through visual weight of different elements. In asymmetrical balance visual weight is kept equal. Exam tip: remember different but balanced.

Step 3

Exam Tip

असममित संतुलन में दृश्य भार बराबर रखा जाता है। परीक्षा में different but balanced याद रखें।

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दोनों ओर अलग तत्व हों लेकिन दृश्य भार बराबर हो तो क्या कहलाएगा?

What is it called when both sides have different elements but equal visual weight?

Explanation opens after your attempt
Correct Answer

C. असममित संतुलनAsymmetrical balance

Step 1

Concept

In asymmetrical balance different elements still look balanced. Exam tip: remember different but balanced.

Step 2

Why this answer is correct

The correct answer is C. असममित संतुलन / Asymmetrical balance. In asymmetrical balance different elements still look balanced. Exam tip: remember different but balanced.

Step 3

Exam Tip

असममित संतुलन में अलग तत्व भी संतुलित लगते हैं। परीक्षा में different but balanced याद रखें।

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दोनों ओर समान दृश्य भार और समान आकृति हो तो कौन सा संतुलन है?

If both sides have equal visual weight and similar figures what balance is it?

Explanation opens after your attempt
Correct Answer

B. सममित संतुलनSymmetrical balance

Step 1

Concept

Symmetrical balance has similarity on both sides. Exam tip: write mirror-like balance as symmetrical.

Step 2

Why this answer is correct

The correct answer is B. सममित संतुलन / Symmetrical balance. Symmetrical balance has similarity on both sides. Exam tip: write mirror-like balance as symmetrical.

Step 3

Exam Tip

सममित संतुलन में दोनों ओर समानता होती है। परीक्षा में mirror like balance को symmetrical लिखें।

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चित्र में डिब्बे के अलग अलग भागों पर अलग मान लगाने से क्या समझ आता है?

What is understood by applying different values on different sides of a box?

Explanation opens after your attempt
Correct Answer

D. सतहों की दिशा और गहराईDirection of surfaces and depth

Step 1

Concept

Different values show different surfaces and depth of a box. Exam tip: remember light side and dark side in cube shading.

Step 2

Why this answer is correct

The correct answer is D. सतहों की दिशा और गहराई / Direction of surfaces and depth. Different values show different surfaces and depth of a box. Exam tip: remember light side and dark side in cube shading.

Step 3

Exam Tip

अलग मान डिब्बे की अलग सतहें और गहराई दिखाते हैं। परीक्षा में cube shading में light side dark side याद रखें।

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मूर्तिकला में दर्शक वस्तु को कई दिशाओं से देख सकता है क्योंकि वह क्या है?

In sculpture the viewer can see an object from many sides because it is what?

Explanation opens after your attempt
Correct Answer

D. त्रि आयामी रूपThree-dimensional form

Step 1

Concept

Sculpture is a three-dimensional form. Exam tip: treat sculpture as a key example of form.

Step 2

Why this answer is correct

The correct answer is D. त्रि आयामी रूप / Three-dimensional form. Sculpture is a three-dimensional form. Exam tip: treat sculpture as a key example of form.

Step 3

Exam Tip

मूर्तिकला त्रि आयामी रूप होती है। परीक्षा में मूर्तिकला को रूप का प्रमुख उदाहरण मानें।

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किस आकार में स्पष्ट कोने और सीधी भुजाएं होती हैं?

Which shape has clear corners and straight sides?

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Correct Answer

C. वर्गSquare

Step 1

Concept

A square has clear corners and straight sides. Exam tip: treat square as a geometric shape.

Step 2

Why this answer is correct

The correct answer is C. वर्ग / Square. A square has clear corners and straight sides. Exam tip: treat square as a geometric shape.

Step 3

Exam Tip

वर्ग में स्पष्ट कोने और सीधी भुजाएं होती हैं। परीक्षा में square को geometric shape मानें।

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यदि दोनों ओर समान दृश्य भार हो तो संतुलन कैसा कहलाता है?

If both sides have equal visual weight what is the balance called?

Explanation opens after your attempt
Correct Answer

D. सममित संतुलनSymmetrical balance

Step 1

Concept

Symmetrical balance has similarity on both sides. Exam tip: call mirror-like balance symmetrical.

Step 2

Why this answer is correct

The correct answer is D. सममित संतुलन / Symmetrical balance. Symmetrical balance has similarity on both sides. Exam tip: call mirror-like balance symmetrical.

Step 3

Exam Tip

सममित संतुलन में दोनों ओर समानता होती है। परीक्षा में mirror like balance को symmetrical कहें।

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पश्चिमी घाट के पवनाभिमुख और पवनविमुख भागों का अंतर किस प्रक्रिया से समझा जाता है?

The difference between windward and leeward sides of Western Ghats is understood by which process?

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Correct Answer

A. ओरोग्राफिक वर्षा और वर्षाछायाOrographic rainfall and rain shadow

Step 1

Concept

Moist monsoon winds strike the Ghats causing rain and rain shadow on the other side. For exams remember the term windward.

Step 2

Why this answer is correct

The correct answer is A. ओरोग्राफिक वर्षा और वर्षाछाया / Orographic rainfall and rain shadow. Moist monsoon winds strike the Ghats causing rain and rain shadow on the other side. For exams remember the term windward.

Step 3

Exam Tip

नम मानसूनी पवनें घाटों से टकराकर वर्षा देती हैं और दूसरी ओर वर्षाछाया बनती है। परीक्षा में पवनाभिमुख शब्द याद रखें।

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पश्चिमी घाटों के पवनाभिमुख और पवनविमुख भागों में वर्षा अंतर किस प्रक्रिया से बनता है?

The rainfall difference between windward and leeward sides of Western Ghats is produced by which process?

Explanation opens after your attempt
Correct Answer

A. ओरोग्राफिक उत्थान और वर्षाछायाOrographic uplift and rain shadow

Step 1

Concept

Moist winds rise over the Ghats and a rain shadow forms on the other side. For exams remember Western Ghats and monsoon link.

Step 2

Why this answer is correct

The correct answer is A. ओरोग्राफिक उत्थान और वर्षाछाया / Orographic uplift and rain shadow. Moist winds rise over the Ghats and a rain shadow forms on the other side. For exams remember Western Ghats and monsoon link.

Step 3

Exam Tip

नम पवनें घाटों पर ऊपर उठती हैं और दूसरी ओर वर्षाछाया बनती है। परीक्षा में पश्चिमी घाट और मानसून संबंध याद रखें।

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भारत के किस भाग में समुद्र तीन ओर से घिरा है?

Which part of India is surrounded by sea on three sides?

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Correct Answer

A. प्रायद्वीपीय भागPeninsular part

Step 1

Concept

The peninsular part of India is surrounded by sea on three sides. For exams observe the map of South India.

Step 2

Why this answer is correct

The correct answer is A. प्रायद्वीपीय भाग / Peninsular part. The peninsular part of India is surrounded by sea on three sides. For exams observe the map of South India.

Step 3

Exam Tip

भारत का प्रायद्वीपीय भाग तीन ओर से समुद्र से घिरा है। परीक्षा में दक्षिण भारत का नक्शा देखें।

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भारत का कौन सा भौतिक भाग तीन ओर से समुद्र से घिरा है?

Which physical part of India is surrounded by sea on three sides?

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Correct Answer

A. प्रायद्वीपीय भारतPeninsular India

Step 1

Concept

Peninsular India is surrounded by sea on three sides. For exams remember Arabian Sea Bay of Bengal and Indian Ocean.

Step 2

Why this answer is correct

The correct answer is A. प्रायद्वीपीय भारत / Peninsular India. Peninsular India is surrounded by sea on three sides. For exams remember Arabian Sea Bay of Bengal and Indian Ocean.

Step 3

Exam Tip

प्रायद्वीपीय भारत तीन ओर से समुद्र से घिरा है। परीक्षा में अरब सागर बंगाल की खाड़ी और हिंद महासागर याद रखें।

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अफीम युद्ध मुख्य रूप से किन दो पक्षों के बीच लड़े गए थे?

The Opium Wars were mainly fought between which two sides?

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Correct Answer

C. ब्रिटेन और चीनBritain and China

Step 1

Concept

The Opium Wars were fought between Britain and China over trade interests. For exams, link them with foreign pressure on China.

Step 2

Why this answer is correct

The correct answer is C. ब्रिटेन और चीन / Britain and China. The Opium Wars were fought between Britain and China over trade interests. For exams, link them with foreign pressure on China.

Step 3

Exam Tip

अफीम युद्ध ब्रिटेन और चीन के बीच व्यापारिक हितों को लेकर हुए। परीक्षा में इन्हें चीन पर विदेशी दबाव से जोड़ें।

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हल्दीघाटी का युद्ध किन दो पक्षों के बीच हुआ था?

The Battle of Haldighati was fought between which two sides?

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Correct Answer

C. महाराणा प्रताप और अकबर की सेनाMaharana Pratap and Akbar's army

Step 1

Concept

In 1576 Maharana Pratap faced the Mughal army at Haldighati. Exam tip is to connect it with the Mewar-Mughal conflict.

Step 2

Why this answer is correct

The correct answer is C. महाराणा प्रताप और अकबर की सेना / Maharana Pratap and Akbar's army. In 1576 Maharana Pratap faced the Mughal army at Haldighati. Exam tip is to connect it with the Mewar-Mughal conflict.

Step 3

Exam Tip

1576 में हल्दीघाटी में महाराणा प्रताप ने मुगल सेना का सामना किया। परीक्षा में इसे मेवाड़-मुगल संघर्ष से जोड़ें।

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पानीपत का प्रथम युद्ध किन दो पक्षों के बीच लड़ा गया था?

The First Battle of Panipat was fought between which two sides?

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Correct Answer

A. बाबर और इब्राहिम लोदीBabur and Ibrahim Lodi

Step 1

Concept

In 1526 Babur defeated Ibrahim Lodi. Exam tip: connect it with the beginning of Mughal power.

Step 2

Why this answer is correct

The correct answer is A. बाबर और इब्राहिम लोदी / Babur and Ibrahim Lodi. In 1526 Babur defeated Ibrahim Lodi. Exam tip: connect it with the beginning of Mughal power.

Step 3

Exam Tip

1526 में बाबर ने इब्राहिम लोदी को हराया। परीक्षा में इसे मुगल सत्ता की शुरुआत से जोड़ें।

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संख्या रेखा पर \(\sqrt{29}\) बनाने के लिए समकोण त्रिभुज की कौन सी दो लंब भुजाएं सही हो सकती हैं?

To construct \(\sqrt{29}\) on the number line, which two perpendicular sides of a right triangle can be correct?

Explanation opens after your attempt
Correct Answer

A. (5) और (2)(5) and (2)

Step 1

Concept

\(5^2+2^2=29\), so the hypotenuse will be \(\sqrt{29}\). Check the sum of squares of the sides.

Step 2

Why this answer is correct

The correct answer is A. (5) और (2) / (5) and (2). \(5^2+2^2=29\), so the hypotenuse will be \(\sqrt{29}\). Check the sum of squares of the sides.

Step 3

Exam Tip

\(5^2+2^2=29\), इसलिए कर्ण \(\sqrt{29}\) होगा। भुजाओं के वर्गों का योग जांचें।

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समकोण त्रिभुज में भुजाएं (3) और (4) लेकर संख्या रेखा पर कौन सा मान बनाया जा सकता है?

Using sides (3) and (4) in a right triangle, which value can be constructed on the number line?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

The hypotenuse is \(\sqrt{3^2+4^2}=5\). This is a direct use of a Pythagorean triple.

Step 2

Why this answer is correct

The correct answer is A. (5). The hypotenuse is \(\sqrt{3^2+4^2}=5\). This is a direct use of a Pythagorean triple.

Step 3

Exam Tip

कर्ण \(\sqrt{3^2+4^2}=5\) होता है। यह पाइथागोरस त्रिक का सीधा उपयोग है।

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संख्या रेखा पर \(\sqrt{17}\) बनाने के लिए समकोण त्रिभुज की लंब भुजाएं (4) और (1) ली गई हैं। कर्ण की लंबाई क्या होगी?

To construct \(\sqrt{17}\) on the number line, the perpendicular sides of a right triangle are taken as (4) and (1). What will be the length of the hypotenuse?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{17}\)

Step 1

Concept

The hypotenuse is \(\sqrt{4^2+1^2}=\sqrt{17}\). Use Pythagoras in this type of construction.

Step 2

Why this answer is correct

The correct answer is B. \(\sqrt{17}\). The hypotenuse is \(\sqrt{4^2+1^2}=\sqrt{17}\). Use Pythagoras in this type of construction.

Step 3

Exam Tip

कर्ण \(=\sqrt{4^2+1^2}=\sqrt{17}\) होगा। ऐसी रचना में पाइथागोरस प्रमेय लगाएं।

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संख्या रेखा पर \(\sqrt{13}\) को बनाने के लिए (3) और (2) लंब भुजाओं वाला समकोण त्रिभुज बनाया जाए तो कर्ण क्या होगा?

To construct \(\sqrt{13}\) on the number line, if a right triangle has perpendicular sides (3) and (2), what is the hypotenuse?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{13}\)

Step 1

Concept

The hypotenuse is \(\sqrt{3^2+2^2}=\sqrt{13}\). Apply Pythagoras in a right triangle.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{13}\). The hypotenuse is \(\sqrt{3^2+2^2}=\sqrt{13}\). Apply Pythagoras in a right triangle.

Step 3

Exam Tip

कर्ण \(=\sqrt{3^2+2^2}=\sqrt{13}\) होता है। समकोण त्रिभुज में पाइथागोरस प्रमेय लागू करें।

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संख्या रेखा पर \(\sqrt{2}\) को बनाने के लिए समकोण त्रिभुज की दो लंब भुजाएं (1) और (1) ली गई हैं। कर्ण की लंबाई क्या होगी?

To construct \(\sqrt{2}\) on the number line, two perpendicular sides of a right triangle are taken as (1) and (1). What will be the length of the hypotenuse?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{2}\)

Step 1

Concept

By Pythagoras the hypotenuse is \(\sqrt{1^2+1^2}=\sqrt{2}\). In such constructions always add the squares of perpendicular sides.

Step 2

Why this answer is correct

The correct answer is B. \(\sqrt{2}\). By Pythagoras the hypotenuse is \(\sqrt{1^2+1^2}=\sqrt{2}\). In such constructions always add the squares of perpendicular sides.

Step 3

Exam Tip

पाइथागोरस से कर्ण \(=\sqrt{1^2+1^2}=\sqrt{2}\) होगा। ऐसी रचनाओं में वर्गों का योग जरूर देखें।

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एक समकोण त्रिभुज के दो छोटे पक्ष (x) सेमी और (x+2) सेमी हैं तथा कर्ण (10) सेमी है। बड़ा छोटा पक्ष क्या है?

The two shorter sides of a right triangle are (x) cm and (x+2) cm, and the hypotenuse is (10) cm. What is the larger shorter side?

Explanation opens after your attempt
Correct Answer

C. (8) सेमी(8) cm

Step 1

Concept

We get (x-2+(x+2)2=100). This gives (x=6), so the larger shorter side is (8) cm.

Step 2

Why this answer is correct

The correct answer is C. (8) सेमी / (8) cm. We get (x-2+(x+2)2=100). This gives (x=6), so the larger shorter side is (8) cm.

Step 3

Exam Tip

(x-2+(x+2)2=100) बनता है। इससे (x=6) मिलता है इसलिए बड़ा छोटा पक्ष (8) सेमी है।

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एक किसान के पास (100) मीटर बाड़ है जिससे वह दीवार के साथ आयताकार खेत के तीन ओर घेरता है। अधिकतम क्षेत्रफल कब मिलेगा?

A farmer has (100) m fencing to enclose three sides of a rectangular field along a wall. When will the maximum area occur?

Explanation opens after your attempt
Correct Answer

B. चौड़ाई (25) मीटरBreadth (25) m

Step 1

Concept

If breadth is (x), length is (100-2x) and area is (A=x(100-2x)). For maximum area, \(x=\frac{100}{4}=25\).

Step 2

Why this answer is correct

The correct answer is B. चौड़ाई (25) मीटर / Breadth (25) m. If breadth is (x), length is (100-2x) and area is (A=x(100-2x)). For maximum area, \(x=\frac{100}{4}=25\).

Step 3

Exam Tip

यदि चौड़ाई (x) है तो लंबाई (100-2x) और क्षेत्रफल (A=x(100-2x)) है। अधिकतम के लिए \(x=\frac{100}{4}=25\) है।

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एक समकोण त्रिभुज की भुजाएँ (x), (x+7) और कर्ण (x+8) हैं। छोटी भुजा क्या है?

The sides of a right triangle are (x), (x+7), and hypotenuse (x+8). What is the smallest side?

Explanation opens after your attempt
Correct Answer

B. (5)

Step 1

Concept

By Pythagoras, (x-2+(x+7)2=(x+8)2). Solving gives (x=5).

Step 2

Why this answer is correct

The correct answer is B. (5). By Pythagoras, (x-2+(x+7)2=(x+8)2). Solving gives (x=5).

Step 3

Exam Tip

पाइथागोरस से (x-2+(x+7)2=(x+8)2)। हल करने पर (x=5) है।

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यदि \(\sqrt{5}=\frac{p}{q}\) है, तो दोनों ओर वर्ग करने के बाद कौन सा समीकरण मिलेगा?

If \(\sqrt{5}=\frac{p}{q}\), which equation is obtained after squaring both sides?

Explanation opens after your attempt
Correct Answer

D. \(p^2=5q^2\)

Step 1

Concept

Squaring both sides gives \(5=\frac{p^2}{q^2}\).

Step 2

Why this answer is correct

Multiplying both sides by \(q^2\) gives \(p^2=5q^2\).

Step 3

Exam Tip

Always write the denominator-clearing step carefully. चरण 1: दोनों ओर वर्ग करने पर \(5=\frac{p^2}{q^2}\) मिलेगा। चरण 2: दोनों ओर \(q^2\) से गुणा करने पर \(p^2=5q^2\) मिलता है। चरण 3: हर हटाने का चरण हमेशा ध्यान से लिखें।

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यदि \(\sqrt{2}=\frac{p}{q}\) हो, तो दोनों ओर वर्ग करने पर क्या मिलेगा?

If \(\sqrt{2}=\frac{p}{q}\), what is obtained after squaring both sides?

Explanation opens after your attempt
Correct Answer

A. \(p^2=2q^2\)

Step 1

Concept

Square both sides of \(\sqrt{2}=\frac{p}{q}\).

Step 2

Why this answer is correct

The left side becomes (2) and the right side becomes \(\frac{p^2}{q^2}\), so \(p^2=2q^2\).

Step 3

Exam Tip

After squaring, multiply by \(q^2\) to clear the denominator. चरण 1: \(\sqrt{2}=\frac{p}{q}\) के दोनों ओर वर्ग करें। चरण 2: बाईं ओर (2) और दाईं ओर \(\frac{p^2}{q^2}\) मिलेगा, इसलिए \(p^2=2q^2\)। चरण 3: वर्ग करने के बाद हर हटाने के लिए दोनों ओर \(q^2\) से गुणा करें।

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सामूहिक अपनापन में भावनात्मक और सांस्कृतिक दोनों पक्ष क्यों जरूरी थे?

Why were both emotional and cultural sides necessary in collective belonging?

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Correct Answer

A. भावना लोगों को जोड़ती थी और संस्कृति उन्हें साझा पहचान देती थीEmotion connected people and culture gave them shared identity

Step 1

Concept

Emotion connects people’s minds.

Step 2

Why this answer is correct

Culture gives them experience of shared heritage.

Step 3

Exam Tip

Understand collective belonging through both emotion and culture. चरण 1: भावना लोगों के मन को जोड़ती है। चरण 2: संस्कृति उन्हें साझा विरासत का अनुभव देती है। चरण 3: सामूहिक अपनापन को मन और संस्कृति दोनों से समझें।

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यदि हृदय के दाएँ और बाएँ भागों के रक्त में अधिक मिश्रण हो जाए तो मुख्य हानि क्या होगी?

If blood from the right and left sides of the heart mixes more, what will be the main disadvantage?

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Correct Answer

A. शरीर को कम ऑक्सीजन युक्त रक्त मिलेगाThe body will receive less oxygen-rich blood

Step 1

Concept

The right side generally has deoxygenated blood and the left side has oxygenated blood.

Step 2

Why this answer is correct

Mixing lowers the oxygen content of blood sent to the body.

Step 3

Exam Tip

This affects cellular respiration and energy production. चरण 1: दाएँ भाग में सामान्यतः ऑक्सीजन रहित रक्त और बाएँ भाग में ऑक्सीजन युक्त रक्त होता है। चरण 2: इनके मिश्रण से शरीर को मिलने वाले रक्त में ऑक्सीजन कम हो सकती है। चरण 3: इससे कोशिकीय श्वसन और ऊर्जा उत्पादन प्रभावित होंगे।

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यदि ऑक्सिन का वितरण दोनों ओर समान बना रहे तो तने का एक दिशा में मुड़ना क्यों घट सकता है?

If auxin distribution remains equal on both sides why can bending of stem in one direction decrease?

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Correct Answer

A. क्योंकि दोनों ओर वृद्धि लगभग समान होगीBecause growth on both sides will be nearly equal

Step 1

Concept

Bending of stem occurs due to unequal growth.

Step 2

Why this answer is correct

Auxin affects cell growth.

Step 3

Exam Tip

If auxin is equal unequal growth will reduce and bending will decrease. चरण 1: तने का मुड़ना असमान वृद्धि से होता है। चरण 2: ऑक्सिन कोशिकाओं की वृद्धि को प्रभावित करता है। चरण 3: यदि ऑक्सिन समान हो तो असमान वृद्धि कम होगी और झुकाव घटेगा।

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यदि परीक्षा में पूछा जाए कि इटली के एकीकरण में उत्तर और दक्षिण को जोड़ने वाले दो प्रमुख पक्ष कौन थे तो सही उत्तर क्या होगा?

If an exam asks which two major sides connected north and south in Italian unification, what is the correct answer?

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Correct Answer

A. उत्तर में कावूर की कूटनीति और दक्षिण में गैरीबाल्डी का अभियानCavour's diplomacy in the north and Garibaldi's campaign in the south

Step 1

Concept

In northern Italy, Cavour played a diplomatic and military role.

Step 2

Why this answer is correct

In the south, Garibaldi led campaigns with volunteers.

Step 3

Exam Tip

Together, both sides strengthened Italian unity. चरण 1: उत्तरी इटली में कावूर ने कूटनीतिक और सैन्य भूमिका निभाई। चरण 2: दक्षिण में गैरीबाल्डी ने स्वयंसेवकों के साथ अभियान चलाया। चरण 3: दोनों पक्षों ने मिलकर इटली की एकता को मजबूत किया।

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उदारवाद के राजनीतिक और आर्थिक पक्षों को सही ढंग से मिलाने वाला विकल्प कौन सा है?

Which option correctly matches the political and economic sides of liberalism?

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Correct Answer

A. राजनीतिक पक्ष प्रतिनिधि शासन से और आर्थिक पक्ष मुक्त बाजार से जुड़ा थाPolitical side was linked with representative rule and economic side with free markets

Step 1

Concept

Separate the two sides of liberalism.

Step 2

Why this answer is correct

Politically it wanted rights and representative rule while economically it wanted free markets.

Step 3

Exam Tip

In matching questions identify both sides separately. चरण 1: उदारवाद के दो पक्ष अलग करें। चरण 2: राजनीति में यह अधिकार और प्रतिनिधि शासन चाहता था जबकि अर्थव्यवस्था में मुक्त बाजार। चरण 3: मिलान वाले प्रश्नों में दोनों पक्षों को अलग पहचानें।

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संतुलित रासायनिक समीकरण में सभी तत्वों के परमाणु दोनों ओर बराबर रखने का सबसे गहरा कारण क्या है?

What is the deepest reason for keeping atoms of all elements equal on both sides of a balanced chemical equation?

Explanation opens after your attempt
Correct Answer

B. द्रव्यमान संरक्षण दिखानाTo show conservation of mass

Step 1

Concept

Atoms are neither created nor destroyed in a reaction.

Step 2

Why this answer is correct

Atoms only rearrange into new substances.

Step 3

Exam Tip

This is the basis of conservation of mass. चरण 1: अभिक्रिया में परमाणु न बनते हैं न नष्ट होते हैं। चरण 2: परमाणु केवल नए पदार्थों में पुनः व्यवस्थित होते हैं। चरण 3: यही द्रव्यमान संरक्षण का आधार है।

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यदि किसी समीकरण में एक तत्व के परमाणु दोनों ओर असमान हैं तो समीकरण की स्थिति क्या होगी?

If atoms of one element are unequal on both sides of an equation what is the condition of the equation?

Explanation opens after your attempt
Correct Answer

A. समीकरण असंतुलित हैThe equation is unbalanced

Step 1

Concept

In a balanced equation every element is equal.

Step 2

Why this answer is correct

If even one element is unequal balancing is incomplete.

Step 3

Exam Tip

Therefore such an equation is unbalanced. चरण 1: संतुलित समीकरण में हर तत्व बराबर होता है। चरण 2: एक तत्व भी असमान हो तो संतुलन पूरा नहीं होता। चरण 3: इसलिए ऐसा समीकरण असंतुलित होगा।

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संतुलित समीकरण में हर तत्व के परमाणु दोनों ओर समान रखने का मुख्य कारण क्या है?

What is the main reason for keeping atoms of every element equal on both sides of a balanced equation?

Explanation opens after your attempt
Correct Answer

A. द्रव्यमान संरक्षण का पालन करनाTo follow conservation of mass

Step 1

Concept

Atoms are not destroyed in a chemical reaction.

Step 2

Why this answer is correct

They are rearranged into new compounds.

Step 3

Exam Tip

Therefore atoms are kept equal on both sides in a balanced equation. चरण 1: रासायनिक अभिक्रिया में परमाणु नष्ट नहीं होते। चरण 2: वे नए यौगिकों में पुनः व्यवस्थित होते हैं। चरण 3: इसलिए संतुलित समीकरण में दोनों ओर परमाणु समान रखे जाते हैं।

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यदि रासायनिक समीकरण में किसी तत्व के परमाणु दोनों ओर बराबर नहीं हैं तो समीकरण क्या कहलाएगा?

If atoms of an element are not equal on both sides of a chemical equation what is the equation called?

Explanation opens after your attempt
Correct Answer

A. असंतुलित समीकरणUnbalanced equation

Step 1

Concept

In a balanced equation atoms of every element must be equal.

Step 2

Why this answer is correct

If the number of any element differs the equation is not balanced.

Step 3

Exam Tip

Therefore it is called an unbalanced equation. चरण 1: संतुलित समीकरण में हर तत्व के परमाणु बराबर होने चाहिए। चरण 2: यदि किसी तत्व की संख्या अलग है तो संतुलन नहीं हुआ है। चरण 3: इसलिए वह समीकरण असंतुलित कहलाएगा।

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संतुलित समीकरण में दोनों ओर किसकी संख्या समान होती है?

In a balanced equation what is equal on both sides?

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Correct Answer

A. हर तत्व के परमाणुAtoms of each element

Step 1

Concept

A balanced equation is based on conservation of mass.

Step 2

Why this answer is correct

It has equal atoms of each element on both sides.

Step 3

Exam Tip

Check balancing by counting atoms. चरण 1: संतुलित समीकरण द्रव्यमान संरक्षण पर आधारित है। चरण 2: इसमें हर तत्व के परमाणुओं की संख्या दोनों ओर बराबर होती है। चरण 3: संतुलन की जाँच परमाणु गिनकर करें।

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संतुलित समीकरण में दाईं और बाईं ओर ऑक्सीजन परमाणुओं की संख्या कैसी होती है?

In a balanced equation how is the number of oxygen atoms on the right and left sides?

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Correct Answer

A. समानEqual

Step 1

Concept

Balancing is done for every element.

Step 2

Why this answer is correct

Oxygen is also an element so its number must be equal.

Step 3

Exam Tip

Count all elements while checking an equation. चरण 1: संतुलन हर तत्व के लिए किया जाता है। चरण 2: ऑक्सीजन भी एक तत्व है इसलिए इसकी संख्या बराबर होनी चाहिए। चरण 3: समीकरण जाँचते समय सभी तत्वों को गिनें।

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संतुलित रासायनिक समीकरण में दोनों ओर क्या समान होना चाहिए?

What must be equal on both sides of a balanced chemical equation?

Explanation opens after your attempt
Correct Answer

A. परमाणुओं की संख्याNumber of atoms

Step 1

Concept

Balancing means equality on both sides.

Step 2

Why this answer is correct

The number of atoms of each element must be equal on both sides.

Step 3

Exam Tip

Count elements one by one while balancing. चरण 1: संतुलन का अर्थ दोनों ओर समानता है। चरण 2: हर तत्व के परमाणुओं की संख्या दोनों ओर समान होनी चाहिए। चरण 3: संतुलन करते समय तत्वों को एक-एक करके गिनें।

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\(\dfrac{3}{2-\sqrt{3}}\) का हर परिमेय करने पर कौन सा रूप मिलेगा?

Which form is obtained by rationalising the denominator of \(\dfrac{3}{2-\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

A. \(,6+3\sqrt{3},\)

Step 1

Concept

Multiplying by \(2+\sqrt{3}\) makes the denominator (4-3=1). In exams, multiply both numerator and denominator by the conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(,6+3\sqrt{3},\). Multiplying by \(2+\sqrt{3}\) makes the denominator (4-3=1). In exams, multiply both numerator and denominator by the conjugate.

Step 3

Exam Tip

हर को \(2+\sqrt{3}\) से गुणा करने पर हर (4-3=1) हो जाता है। परीक्षा में conjugate से numerator और denominator दोनों को गुणा करें।

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यदि \(5+\sqrt{21}\) किसी परिमेय गुणांक वाले द्विघात बहुपद का शून्यक है, तो उस बहुपद का एक संभव रूप कौन सा है?

If \(5+\sqrt{21}\) is a zero of a quadratic polynomial with rational coefficients, which is one possible form of that polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x+4\)

Step 1

Concept

The other zero will be \(5-\sqrt{21}\). Sum (10) and product (25-21=4) give the polynomial \(x^2-10x+4\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x+4\). The other zero will be \(5-\sqrt{21}\). Sum (10) and product (25-21=4) give the polynomial \(x^2-10x+4\).

Step 3

Exam Tip

दूसरा शून्यक \(5-\sqrt{21}\) होगा। योग (10) और गुणनफल (25-21=4) से बहुपद \(x^2-10x+4\) बनता है।

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यदि (p(x)=x-2-2kx+20) के शून्यक \(k+\sqrt{5}\) और \(k-\sqrt{5}\) हैं, तो (k) का धनात्मक मान क्या है?

If the zeroes of (p(x)=x-2-2kx+20) are \(k+\sqrt{5}\) and \(k-\sqrt{5}\), what is the positive value of (k)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

From the product \(k^2-5=20\) we get \(k^2=25\) and positive (k=5). In exams find the unknown from the product.

Step 2

Why this answer is correct

The correct answer is A. (5). From the product \(k^2-5=20\) we get \(k^2=25\) and positive (k=5). In exams find the unknown from the product.

Step 3

Exam Tip

गुणनफल \(k^2-5=20\) से \(k^2=25\) और धनात्मक (k=5) है। परीक्षा में गुणनफल से अज्ञात निकालें।

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यदि परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(4+\sqrt{11}\) है, तो दूसरा शून्यक कौन सा होगा?

If one zero of a quadratic polynomial with rational coefficients is \(4+\sqrt{11}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(4-\sqrt{11}\)

Step 1

Concept

With rational coefficients \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 2

Why this answer is correct

The correct answer is A. \(4-\sqrt{11}\). With rational coefficients \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 3

Exam Tip

परिमेय गुणांकों में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक होता है। परीक्षा में संयुग्मी शून्यक तुरंत पहचानें।

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यदि (p(x)=x-2-6x+k) के शून्यक \(3+\sqrt{2}\) और \(3-\sqrt{2}\) हैं, तो (k) का मान क्या है?

If the zeroes of (p(x)=x-2-6x+k) are \(3+\sqrt{2}\) and \(3-\sqrt{2}\), what is the value of (k)?

Explanation opens after your attempt
Correct Answer

A. (7)

Step 1

Concept

The product (\(3+\sqrt{2}\)\(3-\sqrt{2}\)=9-2=7), so (k=7). In exams connect the constant term with the product of zeroes.

Step 2

Why this answer is correct

The correct answer is A. (7). The product (\(3+\sqrt{2}\)\(3-\sqrt{2}\)=9-2=7), so (k=7). In exams connect the constant term with the product of zeroes.

Step 3

Exam Tip

गुणनफल (\(3+\sqrt{2}\)\(3-\sqrt{2}\)=9-2=7) है, इसलिए (k=7) होगा। परीक्षा में स्थिर पद को शून्यकों के गुणनफल से जोड़ें।

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यदि (p(x)=x-2-2kx+9) के शून्यक \(k+\sqrt{7}\) और \(k-\sqrt{7}\) हैं, तो (k) का मान क्या होगा?

If the zeroes of (p(x)=x-2-2kx+9) are \(k+\sqrt{7}\) and \(k-\sqrt{7}\), what is the value of (k)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

From the product \(k^2-7=9\), we get \(k^2=16\), and (k=4) fits the given form. In exams use the product to find the unknown.

Step 2

Why this answer is correct

The correct answer is A. (4). From the product \(k^2-7=9\), we get \(k^2=16\), and (k=4) fits the given form. In exams use the product to find the unknown.

Step 3

Exam Tip

गुणनफल \(k^2-7=9\) से \(k^2=16\) मिलता है और दिए रूप में (k=4) उपयुक्त है। परीक्षा में गुणनफल से अज्ञात निकालें।

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यदि \(\frac{1}{\sqrt{7}+\sqrt{6}}\) को परिमेयकृत किया जाए, तो मान क्या होगा?

If \(\frac{1}{\sqrt{7}+\sqrt{6}}\) is rationalized, what is its value?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{7}-\sqrt{6}\)

Step 1

Concept

The conjugate of the denominator is \(\sqrt{7}-\sqrt{6}\), and the denominator becomes (7-6=1). In exams the answer simplifies when the difference is (1).

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{7}-\sqrt{6}\). The conjugate of the denominator is \(\sqrt{7}-\sqrt{6}\), and the denominator becomes (7-6=1). In exams the answer simplifies when the difference is (1).

Step 3

Exam Tip

हर का संयुग्मी \(\sqrt{7}-\sqrt{6}\) है और हर (7-6=1) बनता है। परीक्षा में अंतर (1) होने पर उत्तर सरल हो जाता है।

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यदि \(2+\sqrt{3}\) किसी परिमेय गुणांक वाले बहुपद का शून्यक है, तो किस रैखिक गुणनखंड का साथ आना अपेक्षित है?

If \(2+\sqrt{3}\) is a zero of a polynomial with rational coefficients, which linear factor is expected to accompany it?

Explanation opens after your attempt
Correct Answer

A. (x-\(2-\sqrt{3}\))

Step 1

Concept

The companion zero is \(2-\sqrt{3}\), so the factor is (x-\(2-\sqrt{3}\)). In exams remember the relation between a zero and factor as \(x-\alpha\).

Step 2

Why this answer is correct

The correct answer is A. (x-\(2-\sqrt{3}\)). The companion zero is \(2-\sqrt{3}\), so the factor is (x-\(2-\sqrt{3}\)). In exams remember the relation between a zero and factor as \(x-\alpha\).

Step 3

Exam Tip

साथी शून्यक \(2-\sqrt{3}\) होगा, इसलिए गुणनखंड (x-\(2-\sqrt{3}\)) है। परीक्षा में शून्यक और गुणनखंड का संबंध \(x-\alpha\) याद रखें।

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यदि किसी बहुपद का एक शून्यक \(\sqrt{11}\) है और गुणांक परिमेय हैं, तो कौन सा शून्यक भी होना चाहिए?

If one zero of a polynomial is \(\sqrt{11}\) and the coefficients are rational, which zero should also occur?

Explanation opens after your attempt
Correct Answer

A. -\(\sqrt{11}\)

Step 1

Concept

The conjugate of \(\sqrt{11}=0+\sqrt{11}\) is \(-\sqrt{11}\). In exams also identify the case (a=0).

Step 2

Why this answer is correct

The correct answer is A. -\(\sqrt{11}\). The conjugate of \(\sqrt{11}=0+\sqrt{11}\) is \(-\sqrt{11}\). In exams also identify the case (a=0).

Step 3

Exam Tip

\(\sqrt{11}=0+\sqrt{11}\) का संयुग्मी \(-\sqrt{11}\) है। परीक्षा में (a=0) वाला संयुग्मी भी पहचानें।

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कौन सा बहुपद \(1+\sqrt{6}\) और \(1-\sqrt{6}\) को शून्यक रखता है?

Which polynomial has \(1+\sqrt{6}\) and \(1-\sqrt{6}\) as zeroes?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x-5\)

Step 1

Concept

The sum is (2) and the product is (1-6=-5), so the polynomial is \(x^2-2x-5\). In exams use \(a^2-b^2\) for the product.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-5\). The sum is (2) and the product is (1-6=-5), so the polynomial is \(x^2-2x-5\). In exams use \(a^2-b^2\) for the product.

Step 3

Exam Tip

योग (2) और गुणनफल (1-6=-5) है, इसलिए बहुपद \(x^2-2x-5\) है। परीक्षा में गुणनफल में \(a^2-b^2\) लगाएं।

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यदि (p(x)) परिमेय गुणांकों वाला द्विघात बहुपद है और उसका एक शून्यक \(2+\sqrt{7}\) है, तो दूसरा शून्यक कौन सा होगा?

If (p(x)) is a quadratic polynomial with rational coefficients and one zero is \(2+\sqrt{7}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(2-\sqrt{7}\)

Step 1

Concept

With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{7}\). With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 3

Exam Tip

परिमेय गुणांकों में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक आता है। परीक्षा में संयुग्मी शून्यकों को तुरंत पहचानें।

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परिमेय गुणांकों वाले किसी द्विघात बहुपद का एक शून्यक \(3-\sqrt{5}\) है। दूसरा शून्यक कौन सा होगा?

One zero of a quadratic polynomial with rational coefficients is \(3-\sqrt{5}\). What will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(3+\sqrt{5}\)

Step 1

Concept

For rational coefficients, irrational zeroes usually occur in conjugate pairs. Hence the companion zero of \(3-\sqrt{5}\) is \(3+\sqrt{5}\).

Step 2

Why this answer is correct

The correct answer is A. \(3+\sqrt{5}\). For rational coefficients, irrational zeroes usually occur in conjugate pairs. Hence the companion zero of \(3-\sqrt{5}\) is \(3+\sqrt{5}\).

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय शून्यक सामान्यतः संयुग्मी रूप में आते हैं। इसलिए \(3-\sqrt{5}\) का साथी शून्यक \(3+\sqrt{5}\) होगा।

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यदि \(x=\frac{1}{\sqrt{5}-2}\), तो (x) का सरल रूप क्या है?

If \(x=\frac{1}{\sqrt{5}-2}\), what is the simplified form of (x)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}+2\)

Step 1

Concept

\(\frac{1}{\sqrt{5}-2}\times\frac{\sqrt{5}+2}{\sqrt{5}+2}=\frac{\sqrt{5}+2}{5-4}=\sqrt{5}+2\). Rationalise the denominator in exams.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{5}+2\). \(\frac{1}{\sqrt{5}-2}\times\frac{\sqrt{5}+2}{\sqrt{5}+2}=\frac{\sqrt{5}+2}{5-4}=\sqrt{5}+2\). Rationalise the denominator in exams.

Step 3

Exam Tip

\(\frac{1}{\sqrt{5}-2}\times\frac{\sqrt{5}+2}{\sqrt{5}+2}=\frac{\sqrt{5}+2}{5-4}=\sqrt{5}+2\) है। परीक्षा में हर का परिमेयकरण करें।

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यदि \(x=\sqrt{6}+\sqrt{2}\) और \(y=\sqrt{6}-\sqrt{2}\), तो (xy) क्या है?

If \(x=\sqrt{6}+\sqrt{2}\) and \(y=\sqrt{6}-\sqrt{2}\), what is (xy)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

(xy=\(\sqrt{6}\)2-\(\sqrt{2}\)2=6-2=4). Conjugate multiplication saves time in exams.

Step 2

Why this answer is correct

The correct answer is A. (4). (xy=\(\sqrt{6}\)2-\(\sqrt{2}\)2=6-2=4). Conjugate multiplication saves time in exams.

Step 3

Exam Tip

(xy=\(\sqrt{6}\)2-\(\sqrt{2}\)2=6-2=4) है। परीक्षा में संयुग्मी गुणन से समय बचता है।

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निम्न में से कौन सा बहुपद परिमेय गुणांकों वाला है और जिसके शून्यक \(1+\sqrt{2}\) तथा \(1-\sqrt{2}\) हैं?

Which polynomial has rational coefficients and zeroes \(1+\sqrt{2}\) and \(1-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x-1\)

Step 1

Concept

The sum is (2) and the product is (1-2=-1), so the polynomial is \(x^2-2x-1\). Keep signs correct in exams.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-1\). The sum is (2) and the product is (1-2=-1), so the polynomial is \(x^2-2x-1\). Keep signs correct in exams.

Step 3

Exam Tip

योग (2) और गुणनफल (1-2=-1), इसलिए बहुपद \(x^2-2x-1\) है। परीक्षा में चिन्हों को ठीक रखें।

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यदि \(x=\sqrt{2}\) बहुपद \(ax^2+bx+c\) का शून्यक है और (a,b,c) परिमेय हैं, तो कौन सा निष्कर्ष सही नहीं हो सकता?

If \(x=\sqrt{2}\) is a zero of \(ax^2+bx+c\) and (a,b,c) are rational, which conclusion cannot be correct?

Explanation opens after your attempt
Correct Answer

C. सिर्फ \(\sqrt{2}\) ही अकेला अपरिमेय शून्यक हो और गुणांक परिमेय रहेंOnly \(\sqrt{2}\) is the sole irrational zero while coefficients stay rational

Step 1

Concept

In a quadratic with rational coefficients an irrational zero comes with its conjugate. In exams be suspicious of a lone irrational root.

Step 2

Why this answer is correct

The correct answer is C. सिर्फ \(\sqrt{2}\) ही अकेला अपरिमेय शून्यक हो और गुणांक परिमेय रहें / Only \(\sqrt{2}\) is the sole irrational zero while coefficients stay rational. In a quadratic with rational coefficients an irrational zero comes with its conjugate. In exams be suspicious of a lone irrational root.

Step 3

Exam Tip

परिमेय गुणांकों वाले द्विघात में अपरिमेय शून्यक अपने संयुग्मी के साथ आता है। परीक्षा में अकेले अपरिमेय मूल पर संदेह करें।

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यदि \(x=3+\sqrt{8}\), तो \(\frac{1}{x}\) किसके बराबर है?

If \(x=3+\sqrt{8}\), what is \(\frac{1}{x}\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(3-\sqrt{8}\)

Step 1

Concept

Because (\(3+\sqrt{8}\)\(3-\sqrt{8}\)=9-8=1), the reciprocal is \(3-\sqrt{8}\). If the product is (1), the reciprocal is immediate.

Step 2

Why this answer is correct

The correct answer is A. \(3-\sqrt{8}\). Because (\(3+\sqrt{8}\)\(3-\sqrt{8}\)=9-8=1), the reciprocal is \(3-\sqrt{8}\). If the product is (1), the reciprocal is immediate.

Step 3

Exam Tip

क्योंकि (\(3+\sqrt{8}\)\(3-\sqrt{8}\)=9-8=1), इसलिए व्युत्क्रम \(3-\sqrt{8}\) है। परीक्षा में गुणनफल (1) होने पर व्युत्क्रम तुरंत मिल जाता है।

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यदि \(2+\sqrt{3}\) एक बहुपद \(x^2-4x+1\) का शून्यक है, तो दूसरा शून्यक क्या होगा?

If \(2+\sqrt{3}\) is a zero of the polynomial \(x^2-4x+1\), what is the other zero?

Explanation opens after your attempt
Correct Answer

A. \(2-\sqrt{3}\)

Step 1

Concept

For a quadratic with rational coefficients, if \(a+\sqrt{b}\) is a zero then \(a-\sqrt{b}\) is also a zero. The conjugate-root rule is useful in exams.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{3}\). For a quadratic with rational coefficients, if \(a+\sqrt{b}\) is a zero then \(a-\sqrt{b}\) is also a zero. The conjugate-root rule is useful in exams.

Step 3

Exam Tip

परिमेय गुणांकों वाले द्विघात में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक होता है। परीक्षा में संयुग्मी मूल का नियम उपयोगी है।

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यदि \(\alpha=4+\sqrt{15}\) और \(\beta=4-\sqrt{15}\) हैं, तो \(\frac{\alpha}{\beta}+\frac{\beta}{\alpha}\) का मान क्या है?

If \(\alpha=4+\sqrt{15}\) and \(\beta=4-\sqrt{15}\), what is the value of \(\frac{\alpha}{\beta}+\frac{\beta}{\alpha}\)?

Explanation opens after your attempt
Correct Answer

A. (62)

Step 1

Concept

Here \(\alpha+\beta=8\) and \(\alpha\beta=1\), so \(\frac{\alpha}{\beta}+\frac{\beta}{\alpha}=\frac{\alpha^2+\beta^2}{\alpha\beta}=\frac{64-2}{1}=62\). In such questions, first find the sum and product.

Step 2

Why this answer is correct

The correct answer is A. (62). Here \(\alpha+\beta=8\) and \(\alpha\beta=1\), so \(\frac{\alpha}{\beta}+\frac{\beta}{\alpha}=\frac{\alpha^2+\beta^2}{\alpha\beta}=\frac{64-2}{1}=62\). In such questions, first find the sum and product.

Step 3

Exam Tip

\(\alpha+\beta=8\) और \(\alpha\beta=1\), इसलिए \(\frac{\alpha}{\beta}+\frac{\beta}{\alpha}=\frac{\alpha^2+\beta^2}{\alpha\beta}=\frac{64-2}{1}=62\)। ऐसे प्रश्नों में पहले योग और गुणनफल निकालें।

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यदि (p(x)=x-2-2x-2) का एक शून्यक \(1+\sqrt{3}\) है, तो दूसरा शून्यक क्या है?

If one zero of (p(x)=x-2-2x-2) is \(1+\sqrt{3}\), what is the other zero?

Explanation opens after your attempt
Correct Answer

A. \(1-\sqrt{3}\)

Step 1

Concept

The sum of zeroes is (2), so the other zero is (2-\(1+\sqrt{3}\)=1-\sqrt{3}). With rational coefficients, the conjugate also appears.

Step 2

Why this answer is correct

The correct answer is A. \(1-\sqrt{3}\). The sum of zeroes is (2), so the other zero is (2-\(1+\sqrt{3}\)=1-\sqrt{3}). With rational coefficients, the conjugate also appears.

Step 3

Exam Tip

शून्यकों का योग (2) है, इसलिए दूसरा शून्यक (2-\(1+\sqrt{3}\)=1-\sqrt{3}) है। परिमेय गुणांकों में संयुग्मी भी मिलता है।

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किस विकल्प में परिमेय गुणांकों वाला द्विघात बहुपद बन सकता है?

Which option can form a quadratic polynomial with rational coefficients?

Explanation opens after your attempt
Correct Answer

A. शून्यक \(6+\sqrt{5}\) और \(6-\sqrt{5}\)Zeroes \(6+\sqrt{5}\) and \(6-\sqrt{5}\)

Step 1

Concept

With rational coefficients, irrational parts occur in conjugate pairs. Only \(6+\sqrt{5}\) and \(6-\sqrt{5}\) have both rational sum and rational product.

Step 2

Why this answer is correct

The correct answer is A. शून्यक \(6+\sqrt{5}\) और \(6-\sqrt{5}\) / Zeroes \(6+\sqrt{5}\) and \(6-\sqrt{5}\). With rational coefficients, irrational parts occur in conjugate pairs. Only \(6+\sqrt{5}\) and \(6-\sqrt{5}\) have both rational sum and rational product.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय भाग संयुग्मी जोड़े में आता है। केवल \(6+\sqrt{5}\) और \(6-\sqrt{5}\) का योग और गुणनफल दोनों परिमेय हैं।

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यदि \(x^2-Sx+P\) के शून्यक \(2\sqrt{3}+1\) और \(2\sqrt{3}-1\) हैं, तो (S) और (P) क्या हैं?

If the zeroes of \(x^2-Sx+P\) are \(2\sqrt{3}+1\) and \(2\sqrt{3}-1\), what are (S) and (P)?

Explanation opens after your attempt
Correct Answer

A. \(S=4\sqrt{3}\), (P=11)

Step 1

Concept

The sum is \(4\sqrt{3}\) and the product is (\(2\sqrt{3}\)2-1=11). (S) equals the sum and (P) equals the product.

Step 2

Why this answer is correct

The correct answer is A. \(S=4\sqrt{3}\), (P=11). The sum is \(4\sqrt{3}\) and the product is (\(2\sqrt{3}\)2-1=11). (S) equals the sum and (P) equals the product.

Step 3

Exam Tip

योग \(4\sqrt{3}\) और गुणनफल (\(2\sqrt{3}\)2-1=11) है। (S) योग और (P) गुणनफल के बराबर है।

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यदि किसी परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(\frac{3+\sqrt{5}}{2}\) है, तो दूसरा शून्यक क्या होगा?

If one zero of a quadratic polynomial with rational coefficients is \(\frac{3+\sqrt{5}}{2}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3-\sqrt{5}}{2}\)

Step 1

Concept

With rational coefficients, the conjugate of the irrational part is also a zero. Hence \(\frac{3-\sqrt{5}}{2}\) is the other zero.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{3-\sqrt{5}}{2}\). With rational coefficients, the conjugate of the irrational part is also a zero. Hence \(\frac{3-\sqrt{5}}{2}\) is the other zero.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय भाग का संयुग्मी भी शून्यक होता है। इसलिए \(\frac{3-\sqrt{5}}{2}\) दूसरा शून्यक है।

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यदि \(x^2+px+q\) के शून्यक \(7+2\sqrt{3}\) और \(7-2\sqrt{3}\) हैं, तो (p+q) क्या है?

If the zeroes of \(x^2+px+q\) are \(7+2\sqrt{3}\) and \(7-2\sqrt{3}\), what is (p+q)?

Explanation opens after your attempt
Correct Answer

A. (23)

Step 1

Concept

The sum is (14), so (p=-14), and the product is (49-12=37), so (q=37). Hence (p+q=23).

Step 2

Why this answer is correct

The correct answer is A. (23). The sum is (14), so (p=-14), and the product is (49-12=37), so (q=37). Hence (p+q=23).

Step 3

Exam Tip

योग (14) है, इसलिए (p=-14), और गुणनफल (49-12=37) है, इसलिए (q=37)। अतः (p+q=23) है।

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यदि \(2+\sqrt{13}\) परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक है, तो उस बहुपद में (x) का गुणांक किस रूप में हो सकता है?

If \(2+\sqrt{13}\) is one zero of a quadratic polynomial with rational coefficients, what can the coefficient of (x) be?

Explanation opens after your attempt
Correct Answer

A. (-4)

Step 1

Concept

The other zero will be \(2-\sqrt{13}\), so the sum is (4). In a monic polynomial, the coefficient of (x) will be (-4).

Step 2

Why this answer is correct

The correct answer is A. (-4). The other zero will be \(2-\sqrt{13}\), so the sum is (4). In a monic polynomial, the coefficient of (x) will be (-4).

Step 3

Exam Tip

दूसरा शून्यक \(2-\sqrt{13}\) होगा, इसलिए योग (4) है। एकक बहुपद में (x) का गुणांक (-4) होगा।

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यदि किसी एकक द्विघात बहुपद के शून्यक \(4+\sqrt{11}\) और \(4-\sqrt{11}\) हैं, तो स्थिर पद क्या होगा?

If the zeroes of a monic quadratic polynomial are \(4+\sqrt{11}\) and \(4-\sqrt{11}\), what will be the constant term?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

The constant term is the product, and (\(4+\sqrt{11}\)\(4-\sqrt{11}\)=16-11=5). In conjugate products, the irrational middle part cancels.

Step 2

Why this answer is correct

The correct answer is A. (5). The constant term is the product, and (\(4+\sqrt{11}\)\(4-\sqrt{11}\)=16-11=5). In conjugate products, the irrational middle part cancels.

Step 3

Exam Tip

स्थिर पद गुणनफल है और (\(4+\sqrt{11}\)\(4-\sqrt{11}\)=16-11=5)। संयुग्मी गुणनफल में बीच का अपरिमेय भाग हट जाता है।

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यदि (p(x)=x-2+ax+7) का एक शून्यक \(\sqrt{7}\) है और (a) परिमेय है, तो (a) क्या होगा?

If one zero of (p(x)=x-2+ax+7) is \(\sqrt{7}\) and (a) is rational, what is (a)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

The other zero will be \(-\sqrt{7}\), so the sum is (0) and (a=-0=0). With rational coefficients, take the conjugate zero.

Step 2

Why this answer is correct

The correct answer is A. (0). The other zero will be \(-\sqrt{7}\), so the sum is (0) and (a=-0=0). With rational coefficients, take the conjugate zero.

Step 3

Exam Tip

दूसरा शून्यक \(-\sqrt{7}\) होगा, इसलिए योग (0) और (a=-0=0) है। परिमेय गुणांक में संयुग्मी शून्यक लेना जरूरी है।

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कौन सा कथन हमेशा सही है यदि द्विघात बहुपद के परिमेय गुणांक और एक शून्यक \(\sqrt{13}\) है?

Which statement is always true if a quadratic polynomial has rational coefficients and one zero is \(\sqrt{13}\)?

Explanation opens after your attempt
Correct Answer

A. दूसरा शून्यक \(-\sqrt{13}\) होगाThe other zero will be \(-\sqrt{13}\)

Step 1

Concept

For rational coefficients, the conjugate \(-\sqrt{13}\) of \(\sqrt{13}\) also appears when the linear coefficient is rational. This follows from \(a+\sqrt{b}\) and \(a-\sqrt{b}\).

Step 2

Why this answer is correct

The correct answer is A. दूसरा शून्यक \(-\sqrt{13}\) होगा / The other zero will be \(-\sqrt{13}\). For rational coefficients, the conjugate \(-\sqrt{13}\) of \(\sqrt{13}\) also appears when the linear coefficient is rational. This follows from \(a+\sqrt{b}\) and \(a-\sqrt{b}\).

Step 3

Exam Tip

परिमेय गुणांकों के लिए \(\sqrt{13}\) का संयुग्मी \(-\sqrt{13}\) भी आता है, जब रैखिक गुणांक परिमेय हो। यह नियम \(a+\sqrt{b}\) और \(a-\sqrt{b}\) पर आधारित है।

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यदि शून्यक \(\frac{1+\sqrt{3}}{2}\) और \(\frac{1-\sqrt{3}}{2}\) हैं, तो उनका गुणनफल क्या है?

If the zeroes are \(\frac{1+\sqrt{3}}{2}\) and \(\frac{1-\sqrt{3}}{2}\), what is their product?

Explanation opens after your attempt
Correct Answer

A. \(-\frac{1}{2}\)

Step 1

Concept

The product is (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}). Use \(a^2-b\) for conjugate products.

Step 2

Why this answer is correct

The correct answer is A. \(-\frac{1}{2}\). The product is (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}). Use \(a^2-b\) for conjugate products.

Step 3

Exam Tip

गुणनफल (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}) है। संयुग्मी गुणनफल में \(a^2-b\) प्रयोग करें।

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किस बहुपद के शून्यक \(1+\sqrt{10}\) और \(1-\sqrt{10}\) हैं?

Which polynomial has zeroes \(1+\sqrt{10}\) and \(1-\sqrt{10}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x-9\)

Step 1

Concept

The sum is (2) and the product is (1-10=-9). So the polynomial is \(x^2-2x-9\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-9\). The sum is (2) and the product is (1-10=-9). So the polynomial is \(x^2-2x-9\).

Step 3

Exam Tip

योग (2) और गुणनफल (1-10=-9) है। इसलिए बहुपद \(x^2-2x-9\) है।

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कौन सा युग्म परिमेय गुणांकों वाले किसी द्विघात बहुपद के अपरिमेय शून्यकों का संभव युग्म है?

Which pair can be irrational zeroes of a quadratic polynomial with rational coefficients?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\)\(4+\sqrt{6}\) and \(4-\sqrt{6}\)

Step 1

Concept

For rational coefficients, the conjugate \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Hence the first pair is correct.

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\) / \(4+\sqrt{6}\) and \(4-\sqrt{6}\). For rational coefficients, the conjugate \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Hence the first pair is correct.

Step 3

Exam Tip

परिमेय गुणांकों के लिए \(a+\sqrt{b}\) का संयुग्मी \(a-\sqrt{b}\) साथ आता है। इसलिए पहला युग्म सही है।

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यदि किसी द्विघात बहुपद के शून्यक \(5+\sqrt{2}\) और \(5-\sqrt{2}\) हैं, तो बहुपद क्या होगा?

If the zeroes of a quadratic polynomial are \(5+\sqrt{2}\) and \(5-\sqrt{2}\), what is the polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x+23\)

Step 1

Concept

The sum is (10) and the product is (25-2=23). Therefore the polynomial is \(x^2-10x+23\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x+23\). The sum is (10) and the product is (25-2=23). Therefore the polynomial is \(x^2-10x+23\).

Step 3

Exam Tip

योग (10) और गुणनफल (25-2=23) है। इसलिए बहुपद \(x^2-10x+23\) होगा।

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यदि \(2+\sqrt{3}\) किसी परिमेय गुणांकों वाले द्विघात बहुपद का शून्यक है, तो दूसरा शून्यक क्या होगा?

If \(2+\sqrt{3}\) is a zero of a quadratic polynomial with rational coefficients, what will the other zero be?

Explanation opens after your attempt
Correct Answer

A. \(2-\sqrt{3}\)

Step 1

Concept

With rational coefficients, the conjugate of an irrational zero is also a zero. So \(2-\sqrt{3}\) will be the other zero.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{3}\). With rational coefficients, the conjugate of an irrational zero is also a zero. So \(2-\sqrt{3}\) will be the other zero.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय शून्यक का संयुग्मी भी शून्यक होता है। इसलिए \(2-\sqrt{3}\) दूसरा शून्यक होगा।

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यदि किसी द्विघात बहुपद के शून्यक \(3+\sqrt{5}\) और \(3-\sqrt{5}\) हैं, तो उनके योग का प्रकार क्या है?

If the zeroes of a quadratic polynomial are \(3+\sqrt{5}\) and \(3-\sqrt{5}\), what is the type of their sum?

Explanation opens after your attempt
Correct Answer

B. परिमेय संख्याRational number

Step 1

Concept

The sum is \(3+\sqrt{5}+3-\sqrt{5}=6\), which is rational. Conjugate irrational numbers often have a rational sum.

Step 2

Why this answer is correct

The correct answer is B. परिमेय संख्या / Rational number. The sum is \(3+\sqrt{5}+3-\sqrt{5}=6\), which is rational. Conjugate irrational numbers often have a rational sum.

Step 3

Exam Tip

योग \(3+\sqrt{5}+3-\sqrt{5}=6\) है, जो परिमेय है। संयुग्मी अपरिमेय संख्याओं का योग अक्सर परिमेय होता है।

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यदि किसी परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(6-2\sqrt{5}\) है, तो उस बहुपद का एक संभव रूप क्या है?

If one zero of a quadratic polynomial with rational coefficients is \(6-2\sqrt{5}\), what is one possible form of that polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-12x+16\)

Step 1

Concept

The other zero is \(6+2\sqrt{5}\). The sum is (12) and product is (36-20=16), so the polynomial is \(x^2-12x+16\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-12x+16\). The other zero is \(6+2\sqrt{5}\). The sum is (12) and product is (36-20=16), so the polynomial is \(x^2-12x+16\).

Step 3

Exam Tip

दूसरा शून्यक \(6+2\sqrt{5}\) होगा। योग (12) और गुणनफल (36-20=16), इसलिए बहुपद \(x^2-12x+16\) है।

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यदि (x-2-2ax+\(a^2-5\)=0) के शून्यक \(a+\sqrt{5}\) और \(a-\sqrt{5}\) हैं, तो यह किस कारण सही है?

If zeroes of (x-2-2ax+\(a^2-5\)=0) are \(a+\sqrt{5}\) and \(a-\sqrt{5}\), why is it correct?

Explanation opens after your attempt
Correct Answer

A. योग (2a) और गुणनफल \(a^2-5\) हैंSum is (2a) and product is \(a^2-5\)

Step 1

Concept

(\(a+\sqrt{5}\)+\(a-\sqrt{5}\)=2a) and (\(a+\sqrt{5}\)\(a-\sqrt{5}\)=a-2-5). These match the polynomial.

Step 2

Why this answer is correct

The correct answer is A. योग (2a) और गुणनफल \(a^2-5\) हैं / Sum is (2a) and product is \(a^2-5\). (\(a+\sqrt{5}\)+\(a-\sqrt{5}\)=2a) and (\(a+\sqrt{5}\)\(a-\sqrt{5}\)=a-2-5). These match the polynomial.

Step 3

Exam Tip

(\(a+\sqrt{5}\)+\(a-\sqrt{5}\)=2a) और (\(a+\sqrt{5}\)\(a-\sqrt{5}\)=a-2-5)। यही बहुपद से मेल खाता है।

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यदि (p(x)=x-2-6x+n) के शून्यक \(3+\sqrt{m}\) और \(3-\sqrt{m}\) हैं तथा (n=5), तो (m) क्या है?

If zeroes of (p(x)=x-2-6x+n) are \(3+\sqrt{m}\) and \(3-\sqrt{m}\), and (n=5), what is (m)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

The product is (9-m), and it equals (n=5). Thus (9-m=5), so (m=4).

Step 2

Why this answer is correct

The correct answer is A. (4). The product is (9-m), and it equals (n=5). Thus (9-m=5), so (m=4).

Step 3

Exam Tip

गुणनफल (9-m) है और वह (n=5) के बराबर है। अतः (9-m=5), इसलिए (m=4)।

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यदि (p(x)=x-2+px+q) के शून्यक \(7+\sqrt{13}\) और \(7-\sqrt{13}\) हैं, तो (p+q) क्या है?

If zeroes of (p(x)=x-2+px+q) are \(7+\sqrt{13}\) and \(7-\sqrt{13}\), what is (p+q)?

Explanation opens after your attempt
Correct Answer

A. (22)

Step 1

Concept

The sum is (14), so (p=-14). The product is (49-13=36), so (q=36) and (p+q=22).

Step 2

Why this answer is correct

The correct answer is A. (22). The sum is (14), so (p=-14). The product is (49-13=36), so (q=36) and (p+q=22).

Step 3

Exam Tip

योग (14) है, इसलिए (p=-14)। गुणनफल (49-13=36) है, इसलिए (q=36) और (p+q=22)।

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यदि किसी द्विघात बहुपद के परिमेय गुणांक हैं और शून्यक \(4+\sqrt{11}\) है, तो शून्यकों का योग क्या होगा?

If a quadratic polynomial has rational coefficients and one zero is \(4+\sqrt{11}\), what will be the sum of its zeroes?

Explanation opens after your attempt
Correct Answer

A. (8)

Step 1

Concept

The other zero will be \(4-\sqrt{11}\). The sum is (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8).

Step 2

Why this answer is correct

The correct answer is A. (8). The other zero will be \(4-\sqrt{11}\). The sum is (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8).

Step 3

Exam Tip

दूसरा शून्यक \(4-\sqrt{11}\) होगा। योग (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8) है।

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यदि \(\alpha=\sqrt{3}+1\) और \(\beta=\sqrt{3}-1\), तो \(\alpha\beta\) क्या है?

If \(\alpha=\sqrt{3}+1\) and \(\beta=\sqrt{3}-1\), what is \(\alpha\beta\)?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

(\alpha\beta=\(\sqrt{3}+1\)\(\sqrt{3}-1\)=3-1=2). The irrational part cancels in conjugate multiplication.

Step 2

Why this answer is correct

The correct answer is A. (2). (\alpha\beta=\(\sqrt{3}+1\)\(\sqrt{3}-1\)=3-1=2). The irrational part cancels in conjugate multiplication.

Step 3

Exam Tip

(\alpha\beta=\(\sqrt{3}+1\)\(\sqrt{3}-1\)=3-1=2) है। संयुग्मी गुणनफल से अपरिमेय भाग कट जाता है।

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किस बहुपद के शून्यक \(1+\sqrt{2}\) और \(1-\sqrt{2}\) हैं?

Which polynomial has zeroes \(1+\sqrt{2}\) and \(1-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x-1\)

Step 1

Concept

The sum is (2) and the product is (-1). So the polynomial is \(x^2-2x-1\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-1\). The sum is (2) and the product is (-1). So the polynomial is \(x^2-2x-1\).

Step 3

Exam Tip

योग (2) और गुणनफल (-1) है। इसलिए बहुपद \(x^2-2x-1\) है।

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किस मान के लिए (p(x)=x-2-10x+k) के शून्यक \(5+\sqrt{2}\) और \(5-\sqrt{2}\) होंगे?

For which value of (k) will (p(x)=x-2-10x+k) have zeroes \(5+\sqrt{2}\) and \(5-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. (23)

Step 1

Concept

The product is (\(5+\sqrt{2}\)\(5-\sqrt{2}\)=25-2=23). So (k=23).

Step 2

Why this answer is correct

The correct answer is A. (23). The product is (\(5+\sqrt{2}\)\(5-\sqrt{2}\)=25-2=23). So (k=23).

Step 3

Exam Tip

गुणनफल (\(5+\sqrt{2}\)\(5-\sqrt{2}\)=25-2=23) है। इसलिए (k=23) होगा।

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यदि \(2+\sqrt{3}\) और \(2-\sqrt{3}\) किसी द्विघात बहुपद के शून्यक हैं, तो बहुपद क्या होगा?

If \(2+\sqrt{3}\) and \(2-\sqrt{3}\) are zeroes of a quadratic polynomial, what is the polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-4x+1\)

Step 1

Concept

The sum is (4) and the product is (1). Therefore the polynomial is \(x^2-4x+1\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-4x+1\). The sum is (4) and the product is (1). Therefore the polynomial is \(x^2-4x+1\).

Step 3

Exam Tip

योग (4) और गुणनफल (1) है। अतः बहुपद \(x^2-4x+1\) है।

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यदि किसी द्विघात बहुपद के परिमेय गुणांक हैं और एक शून्यक \(3+\sqrt{5}\) है, तो दूसरा शून्यक क्या होगा?

If a quadratic polynomial has rational coefficients and one zero is \(3+\sqrt{5}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(3-\sqrt{5}\)

Step 1

Concept

For a quadratic with rational coefficients, \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Remember this as the conjugate-zero rule.

Step 2

Why this answer is correct

The correct answer is A. \(3-\sqrt{5}\). For a quadratic with rational coefficients, \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Remember this as the conjugate-zero rule.

Step 3

Exam Tip

परिमेय गुणांकों वाले द्विघात में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक होता है। परीक्षा में इसे संयुग्मी शून्यक नियम की तरह याद रखें।

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कौन सा विकल्प \(\frac{1}{5-\sqrt{6}}\) का परिमेय हर वाला रूप है?

Which option is the rationalized form of \(\frac{1}{5-\sqrt{6}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{5+\sqrt{6}}{19}\)

Step 1

Concept

The conjugate of the denominator is \(5+\sqrt{6}\), and the denominator becomes (25-6=19). Hence the first option is correct.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{5+\sqrt{6}}{19}\). The conjugate of the denominator is \(5+\sqrt{6}\), and the denominator becomes (25-6=19). Hence the first option is correct.

Step 3

Exam Tip

हर का संयुग्मी \(5+\sqrt{6}\) है और हर (25-6=19) बनता है। इसलिए पहला विकल्प सही है।

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यदि \(a=\sqrt{7}+\sqrt{2}\) और \(b=\sqrt{7}-\sqrt{2}\) हैं तो (ab) का मान क्या है?

If \(a=\sqrt{7}+\sqrt{2}\) and \(b=\sqrt{7}-\sqrt{2}\), what is the value of (ab)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

In conjugate multiplication, (ab=7-2=5). The difference of squares formula gives the answer quickly.

Step 2

Why this answer is correct

The correct answer is A. (5). In conjugate multiplication, (ab=7-2=5). The difference of squares formula gives the answer quickly.

Step 3

Exam Tip

संयुग्मी गुणन में (ab=7-2=5) होता है। अंतर वर्ग सूत्र जल्दी उत्तर देता है।

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कौन सा विकल्प (\left\(\frac{\sqrt{3}+\sqrt{2}}{\sqrt{3}-\sqrt{2}}\right\)) का सरल रूप है?

Which option is the simplified form of (\left\(\frac{\sqrt{3}+\sqrt{2}}{\sqrt{3}-\sqrt{2}}\right\))?

Explanation opens after your attempt
Correct Answer

A. \(5+2\sqrt{6}\)

Step 1

Concept

Multiplying by the conjugate makes the denominator (1). The numerator is (\(\sqrt{3}+\sqrt{2}\)2=5+2\sqrt{6}).

Step 2

Why this answer is correct

The correct answer is A. \(5+2\sqrt{6}\). Multiplying by the conjugate makes the denominator (1). The numerator is (\(\sqrt{3}+\sqrt{2}\)2=5+2\sqrt{6}).

Step 3

Exam Tip

हर के संयुग्मी से गुणा करने पर हर (1) बनता है। अंश (\(\sqrt{3}+\sqrt{2}\)2=5+2\sqrt{6}) है।

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यदि \(x=2+\sqrt{3}\) है तो कौन सा समीकरण सत्य है?

If \(x=2+\sqrt{3}\), which equation is true?

Explanation opens after your attempt
Correct Answer

A. \(x^2-4x+1=0\)

Step 1

Concept

The conjugate is \(2-\sqrt{3}\), with sum (4) and product (1). Hence the equation is \(x^2-4x+1=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-4x+1=0\). The conjugate is \(2-\sqrt{3}\), with sum (4) and product (1). Hence the equation is \(x^2-4x+1=0\).

Step 3

Exam Tip

(x) का संयुग्मी \(2-\sqrt{3}\) है और योग (4), गुणनफल (1) है। इसलिए समीकरण \(x^2-4x+1=0\) है।

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यदि \(m=\frac{1}{\sqrt{5}+\sqrt{2}}\) है तो (m) का सरल रूप क्या है?

If \(m=\frac{1}{\sqrt{5}+\sqrt{2}}\), what is the simplified form of (m)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{\sqrt{5}-\sqrt{2}}{3}\)

Step 1

Concept

Multiplying by the conjugate makes the denominator (5-2=3). So the rationalized form is \(\frac{\sqrt{5}-\sqrt{2}}{3}\).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{\sqrt{5}-\sqrt{2}}{3}\). Multiplying by the conjugate makes the denominator (5-2=3). So the rationalized form is \(\frac{\sqrt{5}-\sqrt{2}}{3}\).

Step 3

Exam Tip

संयुग्मी से गुणा करने पर हर (5-2=3) हो जाता है। इसलिए परिमेय हर वाला रूप \(\frac{\sqrt{5}-\sqrt{2}}{3}\) है।

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कौन सा विकल्प (\(\sqrt{13}+\sqrt{12}\)\(\sqrt{13}-\sqrt{12}\)) का मान है?

Which option is the value of (\(\sqrt{13}+\sqrt{12}\)\(\sqrt{13}-\sqrt{12}\))?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

By difference of squares the value is (13-12=1). Product of conjugate pairs often gives a rational number.

Step 2

Why this answer is correct

The correct answer is A. (1). By difference of squares the value is (13-12=1). Product of conjugate pairs often gives a rational number.

Step 3

Exam Tip

अंतर वर्ग सूत्र से मान (13-12=1) है। संयुग्मी जोड़े का गुणन अक्सर परिमेय देता है।

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यदि \(r=\sqrt{2}+\sqrt{3}\) है तो \(r+\frac{1}{r}\) का सरल रूप क्या है?

If \(r=\sqrt{2}+\sqrt{3}\), what is the simplified form of \(r+\frac{1}{r}\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{3}\)

Step 1

Concept

\(\frac{1}{\sqrt{2}+\sqrt{3}}=\sqrt{3}-\sqrt{2}\). Adding gives \(2\sqrt{3}\).

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{3}\). \(\frac{1}{\sqrt{2}+\sqrt{3}}=\sqrt{3}-\sqrt{2}\). Adding gives \(2\sqrt{3}\).

Step 3

Exam Tip

\(\frac{1}{\sqrt{2}+\sqrt{3}}=\sqrt{3}-\sqrt{2}\) होता है। जोड़ने पर \(2\sqrt{3}\) मिलता है।

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कौन सा विकल्प (\(5+\sqrt{6}\)\(5-\sqrt{6}\)+\sqrt{24}) की प्रकृति सही बताता है?

Which option correctly describes the nature of (\(5+\sqrt{6}\)\(5-\sqrt{6}\)+\sqrt{24})?

Explanation opens after your attempt
Correct Answer

A. अपरिमेय संख्याIrrational number

Step 1

Concept

The first product is (25-6=19) and \(\sqrt{24}=2\sqrt{6}\) is irrational. A rational plus an irrational is irrational.

Step 2

Why this answer is correct

The correct answer is A. अपरिमेय संख्या / Irrational number. The first product is (25-6=19) and \(\sqrt{24}=2\sqrt{6}\) is irrational. A rational plus an irrational is irrational.

Step 3

Exam Tip

पहला गुणनफल (25-6=19) है और \(\sqrt{24}=2\sqrt{6}\) अपरिमेय है। परिमेय और अपरिमेय का योग अपरिमेय होता है।

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यदि \(p=2+\sqrt{3}\) है तो \(\frac{1}{p}\) किसके बराबर है?

If \(p=2+\sqrt{3}\), what is \(\frac{1}{p}\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(2-\sqrt{3}\)

Step 1

Concept

Since (\(2+\sqrt{3}\)\(2-\sqrt{3}\)=1), the reciprocal is \(2-\sqrt{3}\). Recognizing conjugates is a fast method.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{3}\). Since (\(2+\sqrt{3}\)\(2-\sqrt{3}\)=1), the reciprocal is \(2-\sqrt{3}\). Recognizing conjugates is a fast method.

Step 3

Exam Tip

क्योंकि (\(2+\sqrt{3}\)\(2-\sqrt{3}\)=1), इसलिए व्युत्क्रम \(2-\sqrt{3}\) है। संयुग्मी को पहचानना तेज तरीका है।

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कौन सा विकल्प \(\frac{1}{3+\sqrt{5}}\) का परिमेय हर वाला रूप है?

Which option is the rationalized form of \(\frac{1}{3+\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3-\sqrt{5}}{4}\)

Step 1

Concept

The conjugate of the denominator is \(3-\sqrt{5}\) and the denominator becomes (9-5=4). Multiply by the conjugate to rationalize.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{3-\sqrt{5}}{4}\). The conjugate of the denominator is \(3-\sqrt{5}\) and the denominator becomes (9-5=4). Multiply by the conjugate to rationalize.

Step 3

Exam Tip

हर का संयुग्मी \(3-\sqrt{5}\) है और हर (9-5=4) बनता है। परिमेयकरण में संयुग्मी से गुणा करें।

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