यदि (a_n=\frac{n(2n+1)}{3}) है तो \(a_4\) का मान क्या होगा?

If (a_n=\frac{n(2n+1)}{3}) then what is the value of \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (12)

Step 1

Concept

\(a_4=\frac{4\times9}{3}=12\). In exams multiply first and then divide by (3).

Step 2

Why this answer is correct

The correct answer is C. (12). \(a_4=\frac{4\times9}{3}=12\). In exams multiply first and then divide by (3).

Step 3

Exam Tip

\(a_4=\frac{4\times9}{3}=12\) है। परीक्षा में पहले गुणन करें फिर (3) से भाग दें।

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Mathematics Answer, Explanation and Revision Hints

यदि (a_n=\frac{n(2n+1)}{3}) है तो \(a_4\) का मान क्या होगा? / If (a_n=\frac{n(2n+1)}{3}) then what is the value of \(a_4\)?

Correct Answer: C. (12). Explanation: \(a_4=\frac{4\times9}{3}=12\) है। परीक्षा में पहले गुणन करें फिर (3) से भाग दें। / \(a_4=\frac{4\times9}{3}=12\). In exams multiply first and then divide by (3).

Which concept should I revise for this Mathematics MCQ?

\(a_4=\frac{4\times9}{3}=12\). In exams multiply first and then divide by (3).

What exam hint can help solve this Mathematics question?

\(a_4=\frac{4\times9}{3}=12\) है। परीक्षा में पहले गुणन करें फिर (3) से भाग दें।