Hard Mathematics Chapter 1: Real Numbers Class 10 Level 16

कौन सा विकल्प \(\sqrt{5}\) की सिद्धि में सही और पूर्ण तर्क देता है?

Which option gives a correct and complete reasoning in the proof of \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. \(p^2=5q^2\) से (p=5k), फिर (q=5r), इसलिए सहअभाज्य शर्त से विरोधाभासFrom \(p^2=5q^2\), (p=5k), then (q=5r), so contradiction with coprime condition

Step 1

Concept

From \(p^2=5q^2\), (p) is divisible by (5), so (p=5k).

Step 2

Why this answer is correct

Substitution gives (q) also divisible by (5), so (q=5r).

Step 3

Exam Tip

Common factor (5) contradicts the coprime condition. चरण 1: \(p^2=5q^2\) से (p) (5) से विभाज्य है और (p=5k)। चरण 2: रखने पर (q) भी (5) से विभाज्य मिलता है, यानी (q=5r)। चरण 3: दोनों में (5) साझा होना सहअभाज्य शर्त से विरोधाभास है।

FAQs

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What is the correct answer to this Mathematics MCQ?

The correct answer is A. \(p^2=5q^2\) से (p=5k), फिर (q=5r), इसलिए सहअभाज्य शर्त से विरोधाभास / From \(p^2=5q^2\), (p=5k), then (q=5r), so contradiction with coprime condition.

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