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Question Medium Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

कौन सा कथन \(\sqrt{2}\), \(\sqrt{3}\), और \(\sqrt{5}\) की सिद्धि में गलत तरीका है?

Which statement is a wrong method in the proofs of \(\sqrt{2}\), \(\sqrt{3}\), and \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. वर्गमूल को अंदर की संख्या के बराबर माननाTreating the square root as equal to the number inside it

Step 1

Concept

Writing \(\sqrt{2}=2\), \(\sqrt{3}=3\), or \(\sqrt{5}=5\) is wrong.

Step 2

Why this answer is correct

The correct method assumes rationality, writes a fraction, and squares.

Step 3

Exam Tip

Do not treat a square root as equal to the number inside. चरण 1: \(\sqrt{2}=2\), \(\sqrt{3}=3\), या \(\sqrt{5}=5\) लिखना गलत है। चरण 2: सही विधि में परिमेय मानकर भिन्न लिखते हैं और वर्ग करते हैं। चरण 3: वर्गमूल को अंदर की संख्या के बराबर न मानें।

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Question Medium Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

कौन सा विकल्प तीनों प्रमाणों में गलत तरीका है?

Which option is a wrong method in all three proofs?

Explanation opens after your attempt
Correct Answer

A. वर्गमूल को अंदर की संख्या के बराबर मान लेनाTaking the square root equal to the number under it

Step 1

Concept

Treating \(\sqrt{2}\), \(\sqrt{3}\), and \(\sqrt{5}\) as (2), (3), and (5) is wrong.

Step 2

Why this answer is correct

The correct method assumes rationality, writes a fraction, and squares.

Step 3

Exam Tip

Do not write a square root equal to the number under it. चरण 1: \(\sqrt{2}\), \(\sqrt{3}\), और \(\sqrt{5}\) को क्रमशः (2), (3), और (5) के बराबर मानना गलत है। चरण 2: सही विधि में परिमेय मानकर भिन्न रूप लेते हैं और वर्ग करते हैं। चरण 3: वर्गमूल को अंदर की संख्या के बराबर न लिखें।

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Question Hard Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

कौन सा विकल्प \(\sqrt{3}\) की सिद्धि में गलत प्रमाण विधि है?

Which option is a wrong proof method in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(p^2=3q^2\) से सीधे (p=3q) लिखनाDirectly writing (p=3q) from \(p^2=3q^2\)

Step 1

Concept

From \(p^2=3q^2\), \(p^2\) is divisible by (3).

Step 2

Why this answer is correct

This means (p) is divisible by (3), but (p=3q) does not follow directly.

Step 3

Exam Tip

The correct way is to write (p=3k). चरण 1: \(p^2=3q^2\) से \(p^2\) (3) से विभाज्य मिलता है। चरण 2: इससे (p) (3) से विभाज्य है, पर सीधे (p=3q) नहीं मिलता। चरण 3: सही तरीका (p=3k) लिखना है।

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