यदि ( \frac{(n+3)!}{n!}-\frac{(n+2)!}{(n-1)!}=270 ), तो (n) का मान क्या है?

If ( \frac{(n+3)!}{n!}-\frac{(n+2)!}{(n-1)!}=270 ), what is the value of (n)?

Explanation opens after your attempt
Correct Answer

B. (8)

Step 1

Concept

The simplified form is (3(n+2)(n+1)), so ((n+2)(n+1)=90). Since \(10\cdot9=90\), (n=8).

Step 2

Why this answer is correct

The correct answer is B. (8). The simplified form is (3(n+2)(n+1)), so ((n+2)(n+1)=90). Since \(10\cdot9=90\), (n=8).

Step 3

Exam Tip

सरल रूप (3(n+2)(n+1)) है, इसलिए ((n+2)(n+1)=90)। \(10\cdot9=90\), अतः (n=8)।

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Mathematics Answer, Explanation and Revision Hints

यदि ( \frac{(n+3)!}{n!}-\frac{(n+2)!}{(n-1)!}=270 ), तो (n) का मान क्या है? / If ( \frac{(n+3)!}{n!}-\frac{(n+2)!}{(n-1)!}=270 ), what is the value of (n)?

Correct Answer: B. (8). Explanation: सरल रूप (3(n+2)(n+1)) है, इसलिए ((n+2)(n+1)=90)। \(10\cdot9=90\), अतः (n=8)। / The simplified form is (3(n+2)(n+1)), so ((n+2)(n+1)=90). Since \(10\cdot9=90\), (n=8).

Which concept should I revise for this Mathematics MCQ?

The simplified form is (3(n+2)(n+1)), so ((n+2)(n+1)=90). Since \(10\cdot9=90\), (n=8).

What exam hint can help solve this Mathematics question?

सरल रूप (3(n+2)(n+1)) है, इसलिए ((n+2)(n+1)=90)। \(10\cdot9=90\), अतः (n=8)।