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If (\frac{(n+1)!+n!}{(n-1)!}=150) then what is the value of (n)?यदि (\frac{(n+1)!+n!}{(n-1)!}=150) है तो (n) का मान क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (10)(10)
The numerator becomes (n!(n+2)) and division gives (n(n+2)=150). Check carefully because (10\times12=120) is not enough.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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