Hard Mathematics Chapter 1: Real Numbers Class 10 Level 15

यदि \(x=\sqrt{7}\), तो (3x-2) की प्रकृति क्या है?

If \(x=\sqrt{7}\), what is the nature of (3x-2)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

\(3x-2=3\sqrt{7}-2\).

Step 2

Why this answer is correct

\(3\sqrt{7}\) is irrational, and subtracting a rational number keeps it irrational.

Step 3

Exam Tip

A non-zero rational multiple of a surd remains irrational. चरण 1: \(3x-2=3\sqrt{7}-2\) है। चरण 2: \(3\sqrt{7}\) अपरिमेय है और उसमें से परिमेय संख्या घटाने पर परिणाम अपरिमेय रहता है। चरण 3: अशून्य परिमेय गुणक से गुणा करने पर मूल की अपरिमेयता बनी रहती है।

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