यदि (\frac{(n+2)!}{n!}=56) है तो (n) का धनात्मक मान क्या है?
If (\frac{(n+2)!}{n!}=56) then what is the positive value of (n)?
Explanation opens after your attempt
B. (6)
Concept
Simplification gives ((n+2)(n+1)=56). Hence (n=6) is correct.
Why this answer is correct
The correct answer is B. (6). Simplification gives ((n+2)(n+1)=56). Hence (n=6) is correct.
Exam Tip
सरलीकरण से ((n+2)(n+1)=56) मिलता है। अतः (n=6) सही है।
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