यदि ((n+1)! = 72(n-1)!) है तो (n) का मान क्या है?

If ((n+1)! = 72(n-1)!) then what is the value of (n)?

Explanation opens after your attempt
Correct Answer

B. (8)

Step 1

Concept

After cancellation (n(n+1)=72). Since \(8\times9=72\), (n=8).

Step 2

Why this answer is correct

The correct answer is B. (8). After cancellation (n(n+1)=72). Since \(8\times9=72\), (n=8).

Step 3

Exam Tip

काटने पर (n(n+1)=72) मिलता है। \(8\times9=72\) इसलिए (n=8) है।

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Mathematics Answer, Explanation and Revision Hints

यदि ((n+1)! = 72(n-1)!) है तो (n) का मान क्या है? / If ((n+1)! = 72(n-1)!) then what is the value of (n)?

Correct Answer: B. (8). Explanation: काटने पर (n(n+1)=72) मिलता है। \(8\times9=72\) इसलिए (n=8) है। / After cancellation (n(n+1)=72). Since \(8\times9=72\), (n=8).

Which concept should I revise for this Mathematics MCQ?

After cancellation (n(n+1)=72). Since \(8\times9=72\), (n=8).

What exam hint can help solve this Mathematics question?

काटने पर (n(n+1)=72) मिलता है। \(8\times9=72\) इसलिए (n=8) है।