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8 results found for "rational roots" in Class 10.

Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

किस मान के लिए \(x^2-2kx+2=0\) के मूल अपरिमेय और वास्तविक होंगे?

For which value of (k) will the roots of \(x^2-2kx+2=0\) be irrational and real?

Explanation opens after your attempt
Correct Answer

B. (k=2)

Step 1

Concept

For (k=2), the discriminant is (16-8=8), positive but not a perfect square. Therefore the roots are real and irrational.

Step 2

Why this answer is correct

The correct answer is B. (k=2). For (k=2), the discriminant is (16-8=8), positive but not a perfect square. Therefore the roots are real and irrational.

Step 3

Exam Tip

(k=2) पर विविक्तकर (16-8=8), जो धनात्मक पर पूर्ण वर्ग नहीं है। इसलिए मूल वास्तविक और अपरिमेय होंगे।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि \(x^2+2x+5=0\), तो वास्तविक संख्या पद्धति में मूलों के बारे में कौन सा कथन सही है?

If \(x^2+2x+5=0\), which statement about the roots in the real number system is correct?

Explanation opens after your attempt
Correct Answer

C. कोई वास्तविक मूल नहीं हैThere are no real roots

Step 1

Concept

The discriminant is (4-20=-16), which is negative, so there are no real roots. In exams do not treat a negative discriminant as real zeroes.

Step 2

Why this answer is correct

The correct answer is C. कोई वास्तविक मूल नहीं है / There are no real roots. The discriminant is (4-20=-16), which is negative, so there are no real roots. In exams do not treat a negative discriminant as real zeroes.

Step 3

Exam Tip

विविक्तकर (4-20=-16) ऋणात्मक है, इसलिए वास्तविक मूल नहीं हैं। परीक्षा में ऋणात्मक विविक्तकर को वास्तविक शून्यक नहीं मानें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि \(x^2-4x+4=0\), तो मूलों की प्रकृति क्या है?

If \(x^2-4x+4=0\), what is the nature of the roots?

Explanation opens after your attempt
Correct Answer

B. दो समान परिमेयTwo equal rational roots

Step 1

Concept

The discriminant is (16-16=0), so the roots are equal and (x=2) is rational. In exams (D=0) means equal roots.

Step 2

Why this answer is correct

The correct answer is B. दो समान परिमेय / Two equal rational roots. The discriminant is (16-16=0), so the roots are equal and (x=2) is rational. In exams (D=0) means equal roots.

Step 3

Exam Tip

विविक्तकर (16-16=0), इसलिए मूल समान हैं और (x=2) परिमेय है। परीक्षा में (D=0) का अर्थ समान मूल होता है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि \(x^2-6x+1=0\), तो (x) के मान किस प्रकार के हैं?

If \(x^2-6x+1=0\), what type are the values of (x)?

Explanation opens after your attempt
Correct Answer

C. दो अलग अपरिमेय वास्तविकTwo distinct irrational real values

Step 1

Concept

The discriminant is (36-4=32), positive but not a perfect square. So there are two distinct irrational real roots.

Step 2

Why this answer is correct

The correct answer is C. दो अलग अपरिमेय वास्तविक / Two distinct irrational real values. The discriminant is (36-4=32), positive but not a perfect square. So there are two distinct irrational real roots.

Step 3

Exam Tip

विविक्तकर (36-4=32) है, जो पूर्ण वर्ग नहीं है और धनात्मक है। इसलिए दो अलग अपरिमेय वास्तविक मूल मिलते हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-16) है, तो शून्यकों के प्रकार के बारे में सही कथन कौन सा है?

If (p(x)=x-2-16), which statement about the type of zeroes is correct?

Explanation opens after your attempt
Correct Answer

A. दोनों परिमेय वास्तविक हैंBoth are rational real

Step 1

Concept

From \(x^2-16=0\), \(x=\pm4\), which are rational real. Not every square-root type question gives irrational roots.

Step 2

Why this answer is correct

The correct answer is A. दोनों परिमेय वास्तविक हैं / Both are rational real. From \(x^2-16=0\), \(x=\pm4\), which are rational real. Not every square-root type question gives irrational roots.

Step 3

Exam Tip

\(x^2-16=0\) से \(x=\pm4\), जो परिमेय वास्तविक हैं। हर वर्गमूल वाला प्रश्न अपरिमेय नहीं होता।

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Question Easy Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

कौन सा विकल्प केवल परिमेय संख्याएँ दिखाता है?

Which option shows only rational numbers?

Explanation opens after your attempt
Correct Answer

A. (4), (-2), (0.75)

Step 1

Concept

Integers and terminating decimals are rational. Options containing irrational roots or \(\pi\) are not only rational.

Step 2

Why this answer is correct

The correct answer is A. (4), (-2), (0.75). Integers and terminating decimals are rational. Options containing irrational roots or \(\pi\) are not only rational.

Step 3

Exam Tip

पूर्णांक और सांत दशमलव परिमेय होते हैं। जिन विकल्पों में अपरिमेय जड़ या \(\pi\) है वे केवल परिमेय नहीं हैं।

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Question Easy Mathematics Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

\(\sqrt{2}\), \(\sqrt{3}\) और \(\sqrt{5}\) को पूर्णांक क्यों नहीं माना जाता?

Why are \(\sqrt{2}\), \(\sqrt{3}\), and \(\sqrt{5}\) not taken as integers?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (2), (3), और (5) पूर्ण वर्ग नहीं हैंBecause (2), (3), and (5) are not perfect squares

Step 1

Concept

The square root of a perfect square is an integer.

Step 2

Why this answer is correct

(2), (3), and (5) are not perfect squares.

Step 3

Exam Tip

Therefore their square roots are proved irrational. चरण 1: किसी पूर्ण वर्ग का वर्गमूल पूर्णांक होता है। चरण 2: (2), (3), और (5) पूर्ण वर्ग नहीं हैं। चरण 3: इसलिए इनके वर्गमूलों की अपरिमेयता सिद्ध की जाती है।

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Question Easy Mathematics Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

किस कारण से \(\sqrt{2}\), \(\sqrt{3}\) और \(\sqrt{5}\) को सीधे पूर्णांक नहीं माना जा सकता?

Why can \(\sqrt{2}\), \(\sqrt{3}\), and \(\sqrt{5}\) not be directly treated as integers?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (2), (3), और (5) पूर्ण वर्ग नहीं हैंBecause (2), (3), and (5) are not perfect squares

Step 1

Concept

Square roots of perfect squares are integers.

Step 2

Why this answer is correct

(2), (3), and (5) are not perfect squares.

Step 3

Exam Tip

That is why irrationality proofs are studied for their square roots. चरण 1: पूर्ण वर्गों के वर्गमूल पूर्णांक होते हैं। चरण 2: (2), (3), और (5) पूर्ण वर्ग नहीं हैं। चरण 3: इसलिए इनके वर्गमूलों के लिए अपरिमेयता का प्रमाण पढ़ाया जाता है।

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