यदि \(a_n=n^3-n\) है तो \(a_7-a_5\) का मान क्या होगा?

If \(a_n=n^3-n\), what will be the value of \(a_7-a_5\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (216)

Step 1

Concept

\(a_7=336\) and \(a_5=120\), so the difference is (216). Exam tip: calculate cube-based terms separately first.

Step 2

Why this answer is correct

The correct answer is B. (216). \(a_7=336\) and \(a_5=120\), so the difference is (216). Exam tip: calculate cube-based terms separately first.

Step 3

Exam Tip

\(a_7=336\) और \(a_5=120\) इसलिए अंतर (216) है। घन वाले पदों में पहले मान अलग निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=n^3-n\) है तो \(a_7-a_5\) का मान क्या होगा? / If \(a_n=n^3-n\), what will be the value of \(a_7-a_5\)?

Correct Answer: B. (216). Explanation: \(a_7=336\) और \(a_5=120\) इसलिए अंतर (216) है। घन वाले पदों में पहले मान अलग निकालें। / \(a_7=336\) and \(a_5=120\), so the difference is (216). Exam tip: calculate cube-based terms separately first.

Which concept should I revise for this Mathematics MCQ?

\(a_7=336\) and \(a_5=120\), so the difference is (216). Exam tip: calculate cube-based terms separately first.

What exam hint can help solve this Mathematics question?

\(a_7=336\) और \(a_5=120\) इसलिए अंतर (216) है। घन वाले पदों में पहले मान अलग निकालें।