(\frac{(n+1)!}{(n-1)!}) किसके बराबर है?
(\frac{(n+1)!}{(n-1)!}) is equal to which expression?
Explanation opens after your attempt
Correct Answer
B. (n(n+1))
Concept
((n+1)!=(n+1)n(n-1)!). Therefore division gives (n(n+1)).
Why this answer is correct
The correct answer is B. (n(n+1)). ((n+1)!=(n+1)n(n-1)!). Therefore division gives (n(n+1)).
Exam Tip
((n+1)!=(n+1)n(n-1)!) होता है। इसलिए भाग देने पर (n(n+1)) मिलता है।
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