यदि ( \frac{(n+2)!}{(n-1)!}-\frac{(n+1)!}{(n-2)!}=330 ), तो (n) का मान क्या है?
If ( \frac{(n+2)!}{(n-1)!}-\frac{(n+1)!}{(n-2)!}=330 ), what is the value of (n)?
Explanation opens after your attempt
C. (10)
Concept
The simplified form is (3n(n+1)), so (n(n+1)=110). Since \(10\cdot11=110\), (n=10).
Why this answer is correct
The correct answer is C. (10). The simplified form is (3n(n+1)), so (n(n+1)=110). Since \(10\cdot11=110\), (n=10).
Exam Tip
सरल रूप (3n(n+1)) है, इसलिए (n(n+1)=110)। \(10\cdot11=110\), इसलिए (n=10)।
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