यदि \(a_n=n^3-1\) है तो कौन-सा पद (124) के बराबर होगा?

If \(a_n=n^3-1\) then which term is equal to (124)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (n=5)

Step 1

Concept

From \(n^3-1=124\) we get \(n^3=125\) and (n=5). In exams recognize cube numbers.

Step 2

Why this answer is correct

The correct answer is B. (n=5). From \(n^3-1=124\) we get \(n^3=125\) and (n=5). In exams recognize cube numbers.

Step 3

Exam Tip

\(n^3-1=124\) से \(n^3=125\) और (n=5) है। परीक्षा में घन संख्या पहचानें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=n^3-1\) है तो कौन-सा पद (124) के बराबर होगा? / If \(a_n=n^3-1\) then which term is equal to (124)?

Correct Answer: B. (n=5). Explanation: \(n^3-1=124\) से \(n^3=125\) और (n=5) है। परीक्षा में घन संख्या पहचानें। / From \(n^3-1=124\) we get \(n^3=125\) and (n=5). In exams recognize cube numbers.

Which concept should I revise for this Mathematics MCQ?

From \(n^3-1=124\) we get \(n^3=125\) and (n=5). In exams recognize cube numbers.

What exam hint can help solve this Mathematics question?

\(n^3-1=124\) से \(n^3=125\) और (n=5) है। परीक्षा में घन संख्या पहचानें।