यदि ( \frac{(n!)2}{(n-2)!(n+2)!}=\frac{10}{21} ), तो (n) का मान क्या है?

If ( \frac{(n!)2}{(n-2)!(n+2)!}=\frac{10}{21} ), what is the value of (n)?

Explanation opens after your attempt
Correct Answer

B. (5)

Step 1

Concept

The simplified form is ( \frac{n(n-1)}{(n+1)(n+2)} ). Putting (n=5) gives \( \frac{20}{42}=\frac{10}{21} \).

Step 2

Why this answer is correct

The correct answer is B. (5). The simplified form is ( \frac{n(n-1)}{(n+1)(n+2)} ). Putting (n=5) gives \( \frac{20}{42}=\frac{10}{21} \).

Step 3

Exam Tip

सरल रूप ( \frac{n(n-1)}{(n+1)(n+2)} ) है। (n=5) रखने पर \( \frac{20}{42}=\frac{10}{21} \) मिलता है।

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Mathematics Answer, Explanation and Revision Hints

यदि ( \frac{(n!)2}{(n-2)!(n+2)!}=\frac{10}{21} ), तो (n) का मान क्या है? / If ( \frac{(n!)2}{(n-2)!(n+2)!}=\frac{10}{21} ), what is the value of (n)?

Correct Answer: B. (5). Explanation: सरल रूप ( \frac{n(n-1)}{(n+1)(n+2)} ) है। (n=5) रखने पर \( \frac{20}{42}=\frac{10}{21} \) मिलता है। / The simplified form is ( \frac{n(n-1)}{(n+1)(n+2)} ). Putting (n=5) gives \( \frac{20}{42}=\frac{10}{21} \).

Which concept should I revise for this Mathematics MCQ?

The simplified form is ( \frac{n(n-1)}{(n+1)(n+2)} ). Putting (n=5) gives \( \frac{20}{42}=\frac{10}{21} \).

What exam hint can help solve this Mathematics question?

सरल रूप ( \frac{n(n-1)}{(n+1)(n+2)} ) है। (n=5) रखने पर \( \frac{20}{42}=\frac{10}{21} \) मिलता है।