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)?

Explanation opens after your attempt
Correct Answer

B. (8)

Step 1

Concept

The simplified form is (n(n+1)(n+4)). Since \(8\cdot9\cdot12=864\), the equation is invalid.

Step 2

Why this answer is correct

The correct answer is B. (8). The simplified form is (n(n+1)(n+4)). Since \(8\cdot9\cdot12=864\), the equation is invalid.

Step 3

Exam Tip

सरल रूप (n(n+1)(n+4)) है। \(8\cdot9\cdot12=864\) नहीं, इसलिए समीकरण त्रुटिपूर्ण है।

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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.

Which concept should I revise for this Mathematics MCQ?

The simplified form is (n(n+1)(n+4)). Since \(8\cdot9\cdot12=864\), the equation is invalid.

What exam hint can help solve this Mathematics question?

सरल रूप (n(n+1)(n+4)) है। \(8\cdot9\cdot12=864\) नहीं, इसलिए समीकरण त्रुटिपूर्ण है।