यदि (a_n=\frac{n(n+1)}{2}) है, तो \(a_6\) का मान क्या होगा?

If (a_n=\frac{n(n+1)}{2}), what is the value of \(a_6\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (21)

Step 1

Concept

\(a_6=\frac{6\times7}{2}=21\). In exams, multiply first and then divide by (2).

Step 2

Why this answer is correct

The correct answer is A. (21). \(a_6=\frac{6\times7}{2}=21\). In exams, multiply first and then divide by (2).

Step 3

Exam Tip

\(a_6=\frac{6\times7}{2}=21\) है। परीक्षा में गुणन के बाद (2) से भाग दें।

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Mathematics Answer, Explanation and Revision Hints

यदि (a_n=\frac{n(n+1)}{2}) है, तो \(a_6\) का मान क्या होगा? / If (a_n=\frac{n(n+1)}{2}), what is the value of \(a_6\)?

Correct Answer: A. (21). Explanation: \(a_6=\frac{6\times7}{2}=21\) है। परीक्षा में गुणन के बाद (2) से भाग दें। / \(a_6=\frac{6\times7}{2}=21\). In exams, multiply first and then divide by (2).

Which concept should I revise for this Mathematics MCQ?

\(a_6=\frac{6\times7}{2}=21\). In exams, multiply first and then divide by (2).

What exam hint can help solve this Mathematics question?

\(a_6=\frac{6\times7}{2}=21\) है। परीक्षा में गुणन के बाद (2) से भाग दें।