( \frac{(n+2)!}{n!}-\frac{(n+1)!}{(n-1)!} ) का सरल रूप क्या है?
What is the simplified form of ( \frac{(n+2)!}{n!}-\frac{(n+1)!}{(n-1)!} )?
Explanation opens after your attempt
Correct Answer
A. (2(n+1))
Concept
The first term is ((n+2)(n+1)) and the second is (n(n+1)), so the difference is (2(n+1)). Take the common factor out.
Why this answer is correct
The correct answer is A. (2(n+1)). The first term is ((n+2)(n+1)) and the second is (n(n+1)), so the difference is (2(n+1)). Take the common factor out.
Exam Tip
पहला पद ((n+2)(n+1)) और दूसरा (n(n+1)) है, इसलिए अंतर (2(n+1)) है। समान गुणक बाहर निकालें।
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