यदि \(\sqrt{2}=\frac{a}{b}\) और (a) सम है तो (a=2r) रखने पर \(a^2=2b^2\) से क्या मिलेगा?
If \(\sqrt{2}=\frac{a}{b}\) and (a) is even, then after taking (a=2r), what follows from \(a^2=2b^2\)?
Explanation opens after your attempt
Correct Answer
C. \(b^2=2r^2\)
Concept
Putting (a=2r) gives \(4r^2=2b^2\). Simplifying gives \(b^2=2r^2\).
Why this answer is correct
The correct answer is C. \(b^2=2r^2\). Putting (a=2r) gives \(4r^2=2b^2\). Simplifying gives \(b^2=2r^2\).
Exam Tip
(a=2r) रखने पर \(4r^2=2b^2\) मिलता है। सरल करने पर \(b^2=2r^2\) बनता है।
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