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Question Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

कौन सा विकल्प \(\sqrt{5}\) की अपरिमेयता का सही संक्षिप्त कारण है?

Which option is the correct short reason for the irrationality of \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. परिमेय मानने पर अंश और हर दोनों (5) से विभाज्य हो जाते हैंAssuming rational makes both numerator and denominator divisible by (5)

Step 1

Concept

We assume \(\sqrt{5}\) rational and write it in lowest form.

Step 2

Why this answer is correct

The proof shows numerator and denominator both divisible by (5).

Step 3

Exam Tip

This contradicts lowest form, so \(\sqrt{5}\) is irrational. चरण 1: \(\sqrt{5}\) को परिमेय मानकर सरलतम भिन्न में लिखते हैं। चरण 2: प्रमाण से अंश और हर दोनों (5) से विभाज्य मिलते हैं। चरण 3: यह सरलतम रूप के विरुद्ध है, इसलिए \(\sqrt{5}\) अपरिमेय है।

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