यदि ( \frac{(n+3)!-(n+2)!}{(n+1)!}=121 ), तो (n) का मान क्या होगा?
If ( \frac{(n+3)!-(n+2)!}{(n+1)!}=121 ), what will be the value of (n)?
Explanation opens after your attempt
B. (9)
Concept
The simplified form is ((n+2)2). Therefore (n+2=11) and (n=9).
Why this answer is correct
The correct answer is B. (9). The simplified form is ((n+2)2). Therefore (n+2=11) and (n=9).
Exam Tip
सरल रूप ((n+2)2) है। इसलिए (n+2=11) और (n=9)।
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