यदि ( \frac{(2n+1)!}{(2n-1)!}=210 ), तो (n) का मान क्या है?
If ( \frac{(2n+1)!}{(2n-1)!}=210 ), what is the value of (n)?
Explanation opens after your attempt
B. (7)
Concept
((2n+1)(2n)=210) and \(15\cdot14=210\), so (2n=14) and (n=7). Identify the consecutive factors first.
Why this answer is correct
The correct answer is B. (7). ((2n+1)(2n)=210) and \(15\cdot14=210\), so (2n=14) and (n=7). Identify the consecutive factors first.
Exam Tip
((2n+1)(2n)=210) और \(15\cdot14=210\), इसलिए (2n=14) और (n=7)। पहले लगातार गुणकों को पहचानें।
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