यदि (\frac{(n+1)!+n!}{(n-1)!}=150) है तो (n) का मान क्या है?
If (\frac{(n+1)!+n!}{(n-1)!}=150) then what is the value of (n)?
Explanation opens after your attempt
Correct Answer
B. (10)
Concept
The numerator becomes (n!(n+2)) and division gives (n(n+2)=150). Check carefully because \(10\times12=120\) is not enough.
Why this answer is correct
The correct answer is B. (10). The numerator becomes (n!(n+2)) and division gives (n(n+2)=150). Check carefully because \(10\times12=120\) is not enough.
Exam Tip
ऊपर (n!(n+2)) बनता है और भाग देने पर (n(n+2)=150) मिलता है। \(10\times12=120\) नहीं इसलिए सावधानी से जाँचें।
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