यदि \(a^2=2b^2\) और (a=2r) है तो (b) सम क्यों होगा?
If \(a^2=2b^2\) and (a=2r), why will (b) be even?
Explanation opens after your attempt
Correct Answer
C. क्योंकि \(b^2=2r^2\) से \(b^2\) सम हैBecause \(b^2=2r^2\) makes \(b^2\) even
Concept
From \(b^2=2r^2\), \(b^2\) is even. Therefore (b) is also even.
Why this answer is correct
The correct answer is C. क्योंकि \(b^2=2r^2\) से \(b^2\) सम है / Because \(b^2=2r^2\) makes \(b^2\) even. From \(b^2=2r^2\), \(b^2\) is even. Therefore (b) is also even.
Exam Tip
\(b^2=2r^2\) से \(b^2\) सम मिलता है। इसलिए (b) भी सम होगा।
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