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36 results found for "rationalisation" in Class 10.

\(\dfrac{3}{2-\sqrt{3}}\) 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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\(\dfrac{2}{\sqrt{7}+\sqrt{5}}\) का हर परिमेय करने पर कौन सा रूप मिलेगा?

Which form is obtained by rationalising the denominator of \(\dfrac{2}{\sqrt{7}+\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

A. \(,\sqrt{7}-\sqrt{5},\)

Step 1

Concept

Multiplying by \(\sqrt{7}-\sqrt{5}\) makes the denominator (7-5=2) and gives \(\sqrt{7}-\sqrt{5}\). In exams, use the conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(,\sqrt{7}-\sqrt{5},\). Multiplying by \(\sqrt{7}-\sqrt{5}\) makes the denominator (7-5=2) and gives \(\sqrt{7}-\sqrt{5}\). In exams, use the conjugate.

Step 3

Exam Tip

हर को \(\sqrt{7}-\sqrt{5}\) से गुणा करने पर हर (7-5=2) होता है और उत्तर \(\sqrt{7}-\sqrt{5}\) मिलता है। परीक्षा में conjugate का प्रयोग करें।

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\(\dfrac{1}{\sqrt{3}-\sqrt{2}}\) का हर परिमेय करने पर कौन सा रूप मिलेगा?

Which form is obtained by rationalising the denominator of \(\dfrac{1}{\sqrt{3}-\sqrt{2}}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Multiplying by \(\sqrt{3}+\sqrt{2}\) makes the denominator (3-2=1). In exams, remember to multiply by the conjugate.

Step 2

Why this answer is correct

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

Step 3

Exam Tip

हर को \(\sqrt{3}+\sqrt{2}\) से गुणा करने पर हर (3-2=1) हो जाता है। परीक्षा में conjugate से गुणा करना न भूलें।

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यदि \(x^2+ax+b=0\) की जड़ें \(\frac{1}{4+\sqrt{3}}\) और \(\frac{1}{4-\sqrt{3}}\) हैं, तो (a) का मान क्या है?

If the roots of \(x^2+ax+b=0\) are \(\frac{1}{4+\sqrt{3}}\) and \(\frac{1}{4-\sqrt{3}}\), what is the value of (a)?

Explanation opens after your attempt
Correct Answer

A. -\(\frac{8}{13}\)

Step 1

Concept

The sum of roots is \(\frac{1}{4+\sqrt{3}}+\frac{1}{4-\sqrt{3}}=\frac{8}{13}\). In \(x^2+ax+b=0\), the sum is (-a), so \(a=-\frac{8}{13}\).

Step 2

Why this answer is correct

The correct answer is A. -\(\frac{8}{13}\). The sum of roots is \(\frac{1}{4+\sqrt{3}}+\frac{1}{4-\sqrt{3}}=\frac{8}{13}\). In \(x^2+ax+b=0\), the sum is (-a), so \(a=-\frac{8}{13}\).

Step 3

Exam Tip

जड़ों का योग \(\frac{1}{4+\sqrt{3}}+\frac{1}{4-\sqrt{3}}=\frac{8}{13}\) है। \(x^2+ax+b=0\) में योग (-a) होता है, इसलिए \(a=-\frac{8}{13}\)।

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यदि \(x^2+ax+b=0\) की जड़ें \(\frac{1}{3+\sqrt{5}}\) और \(\frac{1}{3-\sqrt{5}}\) हैं, तो (a) का मान क्या है?

If the roots of \(x^2+ax+b=0\) are \(\frac{1}{3+\sqrt{5}}\) and \(\frac{1}{3-\sqrt{5}}\), what is the value of (a)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

After rationalising, the sum of roots is \(\frac{3}{2}\). In \(x^2+ax+b=0\), the sum is (-a), so \(a=-\frac{3}{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(-\frac{3}{2}\). After rationalising, the sum of roots is \(\frac{3}{2}\). In \(x^2+ax+b=0\), the sum is (-a), so \(a=-\frac{3}{2}\).

Step 3

Exam Tip

रैशनलाइज करने पर जड़ों का योग \(\frac{3}{2}\) मिलता है। \(x^2+ax+b=0\) में जड़ों का योग (-a) होता है, इसलिए \(a=-\frac{3}{2}\)।

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यदि \(x^2+ax+b=0\) की जड़ें \(\frac{1}{2+\sqrt{3}}\) और \(\frac{1}{2-\sqrt{3}}\) हैं, तो (a) का मान क्या है?

If the roots of \(x^2+ax+b=0\) are \(\frac{1}{2+\sqrt{3}}\) and \(\frac{1}{2-\sqrt{3}}\), what is the value of (a)?

Explanation opens after your attempt
Correct Answer

A. (-4)

Step 1

Concept

The given roots become \(2-\sqrt{3}\) and \(2+\sqrt{3}\). Their sum is (4), so (a=-4).

Step 2

Why this answer is correct

The correct answer is A. (-4). The given roots become \(2-\sqrt{3}\) and \(2+\sqrt{3}\). Their sum is (4), so (a=-4).

Step 3

Exam Tip

दी गई जड़ें \(2-\sqrt{3}\) और \(2+\sqrt{3}\) बनती हैं। उनका योग (4) है, इसलिए (a=-4)।

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

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

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

(\frac{2}{\sqrt{3}+1}\times\frac{\sqrt{3}-1}{\sqrt{3}-1}=\frac{2\(\sqrt{3}-1\)}{2}=\sqrt{3}-1). The conjugate makes the denominator rational.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{3}-1\). (\frac{2}{\sqrt{3}+1}\times\frac{\sqrt{3}-1}{\sqrt{3}-1}=\frac{2\(\sqrt{3}-1\)}{2}=\sqrt{3}-1). The conjugate makes the denominator rational.

Step 3

Exam Tip

(\frac{2}{\sqrt{3}+1}\times\frac{\sqrt{3}-1}{\sqrt{3}-1}=\frac{2\(\sqrt{3}-1\)}{2}=\sqrt{3}-1) है। परीक्षा में संयुग्मी से हर परिमेय बनता है।

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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 \(x=1+\sqrt{2}\), तो \(x+\frac{1}{x}\) का मान क्या है?

If \(x=1+\sqrt{2}\), what is \(x+\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\frac{1}{1+\sqrt{2}}=\sqrt{2}-1\), so the sum is \(2\sqrt{2}\). Rationalising the denominator is a quick exam method.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{2}\). \(\frac{1}{1+\sqrt{2}}=\sqrt{2}-1\), so the sum is \(2\sqrt{2}\). Rationalising the denominator is a quick exam method.

Step 3

Exam Tip

\(\frac{1}{1+\sqrt{2}}=\sqrt{2}-1\), इसलिए योग \(2\sqrt{2}\) है। परीक्षा में हर का परिमेयकरण तेज तरीका है।

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कौन सा विकल्प वास्तव में परिमेय संख्या है?

Which option is actually a rational number?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{8}\times\sqrt{18}\)

Step 1

Concept

Since \(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), it is rational. In exams simplify products of radicals first.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{8}\times\sqrt{18}\). Since \(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), it is rational. In exams simplify products of radicals first.

Step 3

Exam Tip

\(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), इसलिए यह परिमेय है। परीक्षा में गुणन में वर्गमूलों को पहले एक साथ सरल करें।

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यदि (p(x)=\sqrt{2}x-2-4x+\sqrt{2}), तो शून्यकों का योग क्या है?

If (p(x)=\sqrt{2}x-2-4x+\sqrt{2}), what is the sum of its zeroes?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The sum is \(-\frac{b}{a}=\frac{4}{\sqrt{2}}=2\sqrt{2}\). Rationalising the denominator simplifies the answer.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{2}\). The sum is \(-\frac{b}{a}=\frac{4}{\sqrt{2}}=2\sqrt{2}\). Rationalising the denominator simplifies the answer.

Step 3

Exam Tip

योग \(-\frac{b}{a}=\frac{4}{\sqrt{2}}=2\sqrt{2}\) है। हर का परिमेयकरण करने से उत्तर सरल होता है।

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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 \(a=\sqrt{5}+\sqrt{3}\) और \(b=\sqrt{5}-\sqrt{3}\) हैं तो \(\frac{a}{b}\) का सरल रूप क्या है?

If \(a=\sqrt{5}+\sqrt{3}\) and \(b=\sqrt{5}-\sqrt{3}\), what is the simplified form of \(\frac{a}{b}\)?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{15}\)

Step 1

Concept

Multiplying by the conjugate gives denominator (5-3=2) and numerator \(8+2\sqrt{15}\). The simplified form is \(4+\sqrt{15}\).

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{15}\). Multiplying by the conjugate gives denominator (5-3=2) and numerator \(8+2\sqrt{15}\). The simplified form is \(4+\sqrt{15}\).

Step 3

Exam Tip

संयुग्मी से गुणा करने पर हर (5-3=2) और अंश \(8+2\sqrt{15}\) बनता है। सरल रूप \(4+\sqrt{15}\) 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 \(m=\frac{1}{\sqrt{5}+\sqrt{2}}\) 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 \(\frac{2}{\sqrt{7}-\sqrt{3}}\) का सरल रूप है?

Which option is the simplified form of \(\frac{2}{\sqrt{7}-\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{\sqrt{7}+\sqrt{3}}{2}\)

Step 1

Concept

Multiplying by the conjugate makes the denominator (7-3=4). Hence we get (\frac{2\(\sqrt{7}+\sqrt{3}\)}{4}).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{\sqrt{7}+\sqrt{3}}{2}\). Multiplying by the conjugate makes the denominator (7-3=4). Hence we get (\frac{2\(\sqrt{7}+\sqrt{3}\)}{4}).

Step 3

Exam Tip

संयुग्मी से गुणा करने पर हर (7-3=4) बनता है। इसलिए (\frac{2\(\sqrt{7}+\sqrt{3}\)}{4}) मिलता 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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कौन सा विकल्प \(\frac{4}{\sqrt{2}}\) का सरल रूप है?

Which option is the simplified form of \(\frac{4}{\sqrt{2}}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\frac{4}{\sqrt{2}}=\frac{4\sqrt{2}}{2}=2\sqrt{2}\). Rationalise when a root is in the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{2}\). \(\frac{4}{\sqrt{2}}=\frac{4\sqrt{2}}{2}=2\sqrt{2}\). Rationalise when a root is in the denominator.

Step 3

Exam Tip

\(\frac{4}{\sqrt{2}}=\frac{4\sqrt{2}}{2}=2\sqrt{2}\) है। हर में जड़ हो तो परिमेयकरण करें।

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कौन सा विकल्प \(\frac{3}{\sqrt{3}}\) का सरल रूप है?

Which option is the simplified form of \(\frac{3}{\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{3}\)

Step 1

Concept

\(\frac{3}{\sqrt{3}}=\sqrt{3}\) because \(3=\sqrt{3}\times\sqrt{3}\). Simplify when a root is in the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{3}\). \(\frac{3}{\sqrt{3}}=\sqrt{3}\) because \(3=\sqrt{3}\times\sqrt{3}\). Simplify when a root is in the denominator.

Step 3

Exam Tip

\(\frac{3}{\sqrt{3}}=\sqrt{3}\) क्योंकि \(3=\sqrt{3}\times\sqrt{3}\)। हर में जड़ हो तो सरल करें।

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कौन सा विकल्प \(\frac{2}{\sqrt{2}}\) का सरल रूप है?

Which option is the simplified form of \(\frac{2}{\sqrt{2}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}\)

Step 1

Concept

\(\frac{2}{\sqrt{2}}=\sqrt{2}\). Simplify roots in the denominator to identify the nature.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}\). \(\frac{2}{\sqrt{2}}=\sqrt{2}\). Simplify roots in the denominator to identify the nature.

Step 3

Exam Tip

\(\frac{2}{\sqrt{2}}=\sqrt{2}\) है। हर में जड़ हो तो सरल करके प्रकृति पहचानें।

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कौन सा विकल्प \(\frac{1}{\sqrt{2}}\) की प्रकृति सही बताता है?

Which option correctly describes the nature of \(\frac{1}{\sqrt{2}}\)?

Explanation opens after your attempt
Correct Answer

A. यह अपरिमेय संख्या हैIt is an irrational number

Step 1

Concept

\(\frac{1}{\sqrt{2}}=\frac{\sqrt{2}}{2}\), which is irrational. When a root is in the denominator simplify first.

Step 2

Why this answer is correct

The correct answer is A. यह अपरिमेय संख्या है / It is an irrational number. \(\frac{1}{\sqrt{2}}=\frac{\sqrt{2}}{2}\), which is irrational. When a root is in the denominator simplify first.

Step 3

Exam Tip

\(\frac{1}{\sqrt{2}}=\frac{\sqrt{2}}{2}\) है जो अपरिमेय है। हर में जड़ हो तो पहले सरल करें।

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निम्नलिखित में से कौन-सा \(3+\sqrt{5}\) के बराबर है?

Which of the following is equal to \(3+\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Rationalise \(\frac{4}{3-\sqrt{5}}\) by multiplying by \(3+\sqrt{5}\).

Step 2

Why this answer is correct

The denominator becomes (9-5=4), so the value is \(3+\sqrt{5}\).

Step 3

Exam Tip

Use rationalisation to identify equivalent forms. चरण 1: \(\frac{4}{3-\sqrt{5}}\) को परिमेय करने के लिए \(3+\sqrt{5}\) से गुणा करें। चरण 2: हर (9-5=4) बनता है, इसलिए मान \(3+\sqrt{5}\) है। चरण 3: बराबर रूप पहचानने के लिए परिमेयकरण करें।

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यदि \(x=4-\sqrt{15}\), तो \(\frac{1}{x}\) क्या होगा?

If \(x=4-\sqrt{15}\), what is \(\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{15}\)

Step 1

Concept

In \(\frac{1}{4-\sqrt{15}}\), the conjugate of the denominator is \(4+\sqrt{15}\).

Step 2

Why this answer is correct

The denominator becomes (16-15=1), so the value is \(4+\sqrt{15}\).

Step 3

Exam Tip

Rationalising with the conjugate quickly simplifies the denominator. चरण 1: \(\frac{1}{4-\sqrt{15}}\) में हर का संयुग्म \(4+\sqrt{15}\) है। चरण 2: हर (16-15=1) बनता है, इसलिए मान \(4+\sqrt{15}\) है। चरण 3: संयुग्म से परिमेयकरण करने पर हर जल्दी सरल होता है।

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\(\frac{6}{\sqrt{3}}\) का परिमेय हर वाला सरल रूप क्या है?

What is the simplified form of \(\frac{6}{\sqrt{3}}\) with a rational denominator?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Multiply numerator and denominator by \(\sqrt{3}\).

Step 2

Why this answer is correct

\(\frac{6}{\sqrt{3}}=\frac{6\sqrt{3}}{3}=2\sqrt{3}\).

Step 3

Exam Tip

After rationalising, simplify the answer completely. चरण 1: ऊपर और नीचे \(\sqrt{3}\) से गुणा करें। चरण 2: \(\frac{6}{\sqrt{3}}=\frac{6\sqrt{3}}{3}=2\sqrt{3}\)। चरण 3: परिमेयकरण के बाद उत्तर को पूरी तरह सरल करें।

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\(\frac{1}{4+\sqrt{15}}\) का परिमेय हर वाला रूप क्या है?

What is the form of \(\frac{1}{4+\sqrt{15}}\) with a rational denominator?

Explanation opens after your attempt
Correct Answer

A. \(4-\sqrt{15}\)

Step 1

Concept

The conjugate of \(4+\sqrt{15}\) is \(4-\sqrt{15}\).

Step 2

Why this answer is correct

\(\frac{1}{4+\sqrt{15}}\times\frac{4-\sqrt{15}}{4-\sqrt{15}}=\frac{4-\sqrt{15}}{16-15}=4-\sqrt{15}\).

Step 3

Exam Tip

Use the conjugate of the denominator for rationalisation. चरण 1: हर \(4+\sqrt{15}\) का संयुग्म \(4-\sqrt{15}\) है। चरण 2: \(\frac{1}{4+\sqrt{15}}\times\frac{4-\sqrt{15}}{4-\sqrt{15}}=\frac{4-\sqrt{15}}{16-15}=4-\sqrt{15}\)। चरण 3: परिमेयकरण में हर का संयुग्म प्रयोग करें।

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निम्नलिखित में से कौन-सा \(2+\sqrt{3}\) के बराबर है?

Which of the following is equal to \(2+\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{2-\sqrt{3}}\)

Step 1

Concept

Rationalise \(\frac{1}{2-\sqrt{3}}\) by multiplying by \(2+\sqrt{3}\).

Step 2

Why this answer is correct

The denominator becomes (4-3=1), so the value is \(2+\sqrt{3}\).

Step 3

Exam Tip

Use rationalisation to identify equivalent forms. चरण 1: \(\frac{1}{2-\sqrt{3}}\) का हर परिमेय करने के लिए \(2+\sqrt{3}\) से गुणा करें। चरण 2: हर (4-3=1) बनता है, इसलिए मान \(2+\sqrt{3}\) है। चरण 3: बराबर रूप पहचानने के लिए परिमेयकरण करें।

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यदि \(x=3-\sqrt{8}\), तो \(\frac{1}{x}\) क्या होगा?

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

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

In \(\frac{1}{3-\sqrt{8}}\), the conjugate of the denominator is \(3+\sqrt{8}\).

Step 2

Why this answer is correct

The denominator becomes (9-8=1), so the value is \(3+\sqrt{8}\).

Step 3

Exam Tip

Rationalising with the conjugate quickly simplifies the denominator. चरण 1: \(\frac{1}{3-\sqrt{8}}\) में हर का संयुग्म \(3+\sqrt{8}\) है। चरण 2: हर (9-8=1) बनता है, इसलिए मान \(3+\sqrt{8}\) है। चरण 3: संयुग्म से परिमेयकरण करने पर हर जल्दी सरल होता है।

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\(\frac{4}{\sqrt{2}}\) का परिमेय हर वाला सरल रूप क्या है?

What is the simplified form of \(\frac{4}{\sqrt{2}}\) with a rational denominator?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Multiply numerator and denominator by \(\sqrt{2}\).

Step 2

Why this answer is correct

\(\frac{4}{\sqrt{2}}=\frac{4\sqrt{2}}{2}=2\sqrt{2}\).

Step 3

Exam Tip

After rationalising, simplify the answer completely. चरण 1: ऊपर और नीचे \(\sqrt{2}\) से गुणा करें। चरण 2: \(\frac{4}{\sqrt{2}}=\frac{4\sqrt{2}}{2}=2\sqrt{2}\)। चरण 3: परिमेयकरण के बाद उत्तर को पूरी तरह सरल करें।

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\(\frac{1}{3+\sqrt{8}}\) का परिमेय हर वाला रूप क्या है?

What is the form of \(\frac{1}{3+\sqrt{8}}\) with a rational denominator?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The conjugate of \(3+\sqrt{8}\) is \(3-\sqrt{8}\).

Step 2

Why this answer is correct

\(\frac{1}{3+\sqrt{8}}\times\frac{3-\sqrt{8}}{3-\sqrt{8}}=\frac{3-\sqrt{8}}{9-8}=3-\sqrt{8}\).

Step 3

Exam Tip

Use the conjugate of the denominator for rationalisation. चरण 1: हर \(3+\sqrt{8}\) का संयुग्म \(3-\sqrt{8}\) है। चरण 2: \(\frac{1}{3+\sqrt{8}}\times\frac{3-\sqrt{8}}{3-\sqrt{8}}=\frac{3-\sqrt{8}}{9-8}=3-\sqrt{8}\)। चरण 3: परिमेयकरण में हर का संयुग्म प्रयोग करें।

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\(\frac{7}{\sqrt{7}}\) का सरल रूप क्या है?

What is the simplified form of \(\frac{7}{\sqrt{7}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{7}\)

Step 1

Concept

Multiply numerator and denominator by \(\sqrt{7}\) to remove the root from the denominator.

Step 2

Why this answer is correct

\(\frac{7}{\sqrt{7}}=\frac{7\sqrt{7}}{7}=\sqrt{7}\).

Step 3

Exam Tip

Rationalisation helps when the denominator contains a square root. चरण 1: हर से वर्गमूल हटाने के लिए ऊपर और नीचे \(\sqrt{7}\) से गुणा करें। चरण 2: \(\frac{7}{\sqrt{7}}=\frac{7\sqrt{7}}{7}=\sqrt{7}\)। चरण 3: हर में वर्गमूल हो तो परिमेयकरण मदद करता है।

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यदि \(x=2-\sqrt{3}\), तो \(\frac{1}{x}\) क्या होगा?

If \(x=2-\sqrt{3}\), what is \(\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

For \(\frac{1}{2-\sqrt{3}}\), the conjugate of the denominator is \(2+\sqrt{3}\).

Step 2

Why this answer is correct

Multiplying gives denominator (4-3=1), so the value is \(2+\sqrt{3}\).

Step 3

Exam Tip

Rationalising with the conjugate gives the answer quickly. चरण 1: \(\frac{1}{2-\sqrt{3}}\) में हर का संयुग्म \(2+\sqrt{3}\) है। चरण 2: गुणा करने पर हर (4-3=1) बनता है, इसलिए मान \(2+\sqrt{3}\) है। चरण 3: संयुग्म से परिमेयकरण तेजी से उत्तर देता है।

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\(\frac{2}{\sqrt{3}}\) का परिमेय हर वाला रूप क्या है?

What is the form of \(\frac{2}{\sqrt{3}}\) with a rational denominator?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Multiply numerator and denominator by \(\sqrt{3}\) to remove the square root from the denominator.

Step 2

Why this answer is correct

\(\frac{2}{\sqrt{3}}=\frac{2\sqrt{3}}{3}\).

Step 3

Exam Tip

After rationalising, the denominator should not contain a square root. चरण 1: हर से वर्गमूल हटाने के लिए ऊपर और नीचे \(\sqrt{3}\) से गुणा करें। चरण 2: \(\frac{2}{\sqrt{3}}=\frac{2\sqrt{3}}{3}\)। चरण 3: परिमेयकरण के बाद हर में वर्गमूल नहीं रहना चाहिए।

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\(\frac{1}{2+\sqrt{3}}\) का परिमेय हर वाला रूप क्या है?

What is the form of \(\frac{1}{2+\sqrt{3}}\) with a rational denominator?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The conjugate of the denominator is \(2-\sqrt{3}\).

Step 2

Why this answer is correct

\(\frac{1}{2+\sqrt{3}}\times\frac{2-\sqrt{3}}{2-\sqrt{3}}=\frac{2-\sqrt{3}}{4-3}=2-\sqrt{3}\).

Step 3

Exam Tip

For rationalisation, multiply by the conjugate. चरण 1: हर का संयुग्म \(2-\sqrt{3}\) है। चरण 2: \(\frac{1}{2+\sqrt{3}}\times\frac{2-\sqrt{3}}{2-\sqrt{3}}=\frac{2-\sqrt{3}}{4-3}=2-\sqrt{3}\)। चरण 3: परिमेयकरण में संयुग्म से गुणा करें।

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(\left\(2+\sqrt{3}\right\)\left\(2-\sqrt{3}\right\)) का मान क्या है?

What is the value of (\left\(2+\sqrt{3}\right\)\left\(2-\sqrt{3}\right\))?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

This is of the form ((a+b)(a-b)=a-2-b-2).

Step 2

Why this answer is correct

(22-\(\sqrt{3}\)2=4-3=1).

Step 3

Exam Tip

For conjugate products, difference of squares gives the answer quickly. चरण 1: यह ((a+b)(a-b)=a-2-b-2) का रूप है। चरण 2: (22-\(\sqrt{3}\)2=4-3=1)। चरण 3: संयुग्म रूप वाले गुणन में वर्गों का अंतर जल्दी उत्तर देता है।

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\(\frac{5}{\sqrt{5}}\) का सरल रूप क्या है?

What is the simplified form of \(\frac{5}{\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}\)

Step 1

Concept

To simplify the denominator, multiply top and bottom by \(\sqrt{5}\).

Step 2

Why this answer is correct

\(\frac{5}{\sqrt{5}}=\frac{5\sqrt{5}}{5}=\sqrt{5}\).

Step 3

Exam Tip

Rationalising is useful when a square root appears in the denominator. चरण 1: हर को सरल करने के लिए ऊपर और नीचे \(\sqrt{5}\) से गुणा करें। चरण 2: \(\frac{5}{\sqrt{5}}=\frac{5\sqrt{5}}{5}=\sqrt{5}\)। चरण 3: हर में वर्गमूल हो तो परिमेयकरण उपयोगी होता है।

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\(\frac{1}{\sqrt{2}}\) किस प्रकार की संख्या है?

What type of number is \(\frac{1}{\sqrt{2}}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय संख्याIrrational number

Step 1

Concept

\(\sqrt{2}\) is irrational.

Step 2

Why this answer is correct

\(\frac{1}{\sqrt{2}}=\frac{\sqrt{2}}{2}\), which is irrational.

Step 3

Exam Tip

When a square root is in the denominator, rationalising helps identify the number. चरण 1: \(\sqrt{2}\) अपरिमेय है। चरण 2: \(\frac{1}{\sqrt{2}}=\frac{\sqrt{2}}{2}\), जो अपरिमेय है। चरण 3: हर में वर्गमूल हो तो परिमेयकरण करके पहचानना आसान होता है।

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