यदि ( \frac{(n+2)!-(n+1)!}{n!}=100 ), तो (n) का मान क्या है?
If ( \frac{(n+2)!-(n+1)!}{n!}=100 ), what is the value of (n)?
Explanation opens after your attempt
C. (9)
Concept
The expression becomes ((n+1)2), so (n+1=10). Hence (n=9).
Why this answer is correct
The correct answer is C. (9). The expression becomes ((n+1)2), so (n+1=10). Hence (n=9).
Exam Tip
अभिव्यक्ति ((n+1)2) बनती है, इसलिए (n+1=10)। अतः (n=9)।
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