( \frac{(n+1)!}{(n-1)!}-\frac{n!}{(n-2)!} ) का सरल रूप क्या है?
What is the simplified form of ( \frac{(n+1)!}{(n-1)!}-\frac{n!}{(n-2)!} )?
Explanation opens after your attempt
Correct Answer
C. (2n)
Concept
The first term is (n(n+1)) and the second is (n(n-1)). The difference is (2n).
Why this answer is correct
The correct answer is C. (2n). The first term is (n(n+1)) and the second is (n(n-1)). The difference is (2n).
Exam Tip
पहला पद (n(n+1)) और दूसरा (n(n-1)) है। अंतर (2n) है।
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