सरल रूप (n(n+1)(n+4)) है। \(8\cdot9\cdot12=864\) नहीं, इसलिए समीकरण त्रुटिपूर्ण है। / The simplified form is (n(n+1)(n+4)). Since \(8\cdot9\cdot12=864\), the equation is invalid.
Mathematics Answer, Explanation and Revision Hints
यदि ( \frac{(n+4)!}{(n-1)!(n+3)(n+2)}=840 ), तो (n) का मान क्या है? / If ( \frac{(n+4)!}{(n-1)!(n+3)(n+2)}=840 ), what is the value of (n)?
Correct Answer: B. (8). Explanation: सरल रूप (n(n+1)(n+4)) है। \(8\cdot9\cdot12=864\) नहीं, इसलिए समीकरण त्रुटिपूर्ण है। / The simplified form is (n(n+1)(n+4)). Since \(8\cdot9\cdot12=864\), the equation is invalid.
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