Hard Mathematics Chapter 1: Real Numbers Class 10 Level 14

यदि \(x=\frac{2}{\sqrt{5}}\), तो (x) की प्रकृति क्या है?

If \(x=\frac{2}{\sqrt{5}}\), what is the nature of (x)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

The denominator has \(\sqrt{5}\), which is irrational.

Step 2

Why this answer is correct

Rationalizing gives \(x=\frac{2\sqrt{5}}{5}\), a non-zero rational multiple of an irrational number.

Step 3

Exam Tip

Rationalizing the denominator often reveals the number type clearly. चरण 1: हर में \(\sqrt{5}\) है, जो अपरिमेय है। चरण 2: हर को परिमेय बनाने पर \(x=\frac{2\sqrt{5}}{5}\) मिलेगा, जो अशून्य परिमेय गुणक के साथ अपरिमेय है। चरण 3: हर परिमेय बनाने से संख्या की प्रकृति साफ दिखती है।

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