Easy Mathematics Chapter 1: Real Numbers Class 10 Level 13

यदि (a) एक अशून्य परिमेय संख्या है और (b) एक अपरिमेय संख्या है, तो (ab) सामान्यतः कैसी संख्या होगी?

If (a) is a non-zero rational number and (b) is an irrational number, what type of number is (ab) generally?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय संख्याIrrational number

Step 1

Concept

Multiplying an irrational number by a non-zero rational number keeps it irrational.

Step 2

Why this answer is correct

For example, \(2 \times \sqrt{3}=2\sqrt{3}\), which is irrational.

Step 3

Exam Tip

The non-zero condition is important because multiplication by (0) gives (0). चरण 1: अशून्य परिमेय संख्या से अपरिमेय संख्या को गुणा करने पर परिणाम अपरिमेय रहता है। चरण 2: जैसे \(2 \times \sqrt{3}=2\sqrt{3}\), जो अपरिमेय है। चरण 3: यहां अशून्य शर्त जरूरी है, क्योंकि शून्य से गुणा करने पर परिणाम (0) होगा।

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The correct answer is B. अपरिमेय संख्या / Irrational number.

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