यदि ( \frac{(n+7)!}{(n+4)!}-\frac{(n+6)!}{(n+3)!}=720 ), तो (n) का मान क्या है?
If ( \frac{(n+7)!}{(n+4)!}-\frac{(n+6)!}{(n+3)!}=720 ), what is the value of (n)?
Explanation opens after your attempt
A. (9)
Concept
The simplified form is (3(n+6)(n+5)). Since \(3\cdot15\cdot14=630\), no option is correct.
Why this answer is correct
The correct answer is A. (9). The simplified form is (3(n+6)(n+5)). Since \(3\cdot15\cdot14=630\), no option is correct.
Exam Tip
सरल रूप (3(n+6)(n+5)) है। \(3\cdot15\cdot14=630\) नहीं, इसलिए सही विकल्प नहीं है।
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