Medium Mathematics Chapter 1: Real Numbers Class 10 Level 17

\(\sqrt{5}\) की अपरिमेयता के प्रमाण में (5) के अभाज्य होने का उपयोग कहां होता है?

Where is the fact that (5) is prime used in the proof of irrationality of \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. \(p^2\) (5) से विभाज्य होने पर (p) (5) से विभाज्य कहने मेंIn saying (p) is divisible by (5) when \(p^2\) is divisible by (5)

Step 1

Concept

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

Step 2

Why this answer is correct

Since (5) is prime, (p) is also divisible by (5).

Step 3

Exam Tip

The prime-number rule is the backbone of the proof. चरण 1: \(p^2=5q^2\) से \(p^2\) (5) से विभाज्य है। चरण 2: (5) अभाज्य है, इसलिए (p) भी (5) से विभाज्य होगा। चरण 3: अभाज्य संख्या वाला नियम प्रमाण की रीढ़ है।

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The correct answer is A. \(p^2\) (5) से विभाज्य होने पर (p) (5) से विभाज्य कहने में / In saying (p) is divisible by (5) when \(p^2\) is divisible by (5).

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