( \frac{(n+2)!}{(n-2)!\cdot n(n-1)} ) का सरल रूप क्या है?
What is the simplified form of ( \frac{(n+2)!}{(n-2)!\cdot n(n-1)} )?
Explanation opens after your attempt
B. ( (n+2)(n+1) )
Concept
The numerator becomes ((n+2)(n+1)n(n-1)(n-2)!). After cancellation with the denominator, ((n+2)(n+1)) remains.
Why this answer is correct
The correct answer is B. ( (n+2)(n+1) ). The numerator becomes ((n+2)(n+1)n(n-1)(n-2)!). After cancellation with the denominator, ((n+2)(n+1)) remains.
Exam Tip
ऊपर ((n+2)(n+1)n(n-1)(n-2)!) बनता है। हर से काटने पर ((n+2)(n+1)) बचता है।
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