Hard Mathematics Chapter 1: Real Numbers Class 10 Level 18

किस विकल्प से स्पष्ट होता है कि \(\sqrt{5}\) परिमेय मानना गलत है?

Which option clearly shows that assuming \(\sqrt{5}\) rational is wrong?

Explanation opens after your attempt
Correct Answer

A. सरलतम रूप के अंश और हर दोनों (5) से विभाज्य निकलते हैंNumerator and denominator in lowest form both turn out divisible by (5)

Step 1

Concept

Assuming rationality, \(\sqrt{5}=\frac{a}{b}\) is taken in lowest form.

Step 2

Why this answer is correct

The proof shows that both (a) and (b) are divisible by (5).

Step 3

Exam Tip

This cannot happen in lowest form, so the assumption is false. चरण 1: परिमेय मानने पर \(\sqrt{5}=\frac{a}{b}\) सबसे सरल रूप में लिया जाता है। चरण 2: प्रमाण में (a) और (b) दोनों (5) से विभाज्य निकलते हैं। चरण 3: सरलतम रूप में ऐसा नहीं हो सकता, इसलिए मान्यता गलत है।

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What is the correct answer to this Mathematics MCQ?

The correct answer is A. सरलतम रूप के अंश और हर दोनों (5) से विभाज्य निकलते हैं / Numerator and denominator in lowest form both turn out divisible by (5).

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