( \frac{(n+2)!}{(n-1)!}-\frac{(n+1)!}{(n-2)!} ) का सरल रूप क्या है?
What is the simplified form of ( \frac{(n+2)!}{(n-1)!}-\frac{(n+1)!}{(n-2)!} )?
Explanation opens after your attempt
Correct Answer
A. (3n(n+1))
Concept
The terms become (n(n+1)(n+2)) and (n(n+1)(n-1)). The difference is (3n(n+1)).
Why this answer is correct
The correct answer is A. (3n(n+1)). The terms become (n(n+1)(n+2)) and (n(n+1)(n-1)). The difference is (3n(n+1)).
Exam Tip
पद (n(n+1)(n+2)) और (n(n+1)(n-1)) बनते हैं। अंतर (3n(n+1)) है।
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