यदि ( \frac{(n+5)!-(n+4)!}{(n+3)!}=169 ), तो (n) का मान क्या है?
If ( \frac{(n+5)!-(n+4)!}{(n+3)!}=169 ), what is the value of (n)?
Explanation opens after your attempt
B. (9)
Concept
The expression becomes ((n+4)2). Since (n+4=13), (n=9).
Why this answer is correct
The correct answer is B. (9). The expression becomes ((n+4)2). Since (n+4=13), (n=9).
Exam Tip
अभिव्यक्ति ((n+4)2) बनती है। (n+4=13), इसलिए (n=9)।
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