यदि \(a_n=\frac{n(n+1)}{2}\) है, तो \(a_8\) क्या होगा?

If \(a_n=\frac{n(n+1)}{2}\), what is \(a_8\)?

Author: Muft Shiksha Editorial Team Published: Updated:
Explanation opens after your attempt
Correct Answer

C. (36)

Step 1

Concept

\(a_8=\frac{8\cdot9}{2}=36\). Multiply or simplify before dividing.

Step 2

Why this answer is correct

The correct answer is C. (36). \(a_8=\frac{8\cdot9}{2}=36\). Multiply or simplify before dividing.

Step 3

Exam Tip

\(a_8=\frac{8\cdot9}{2}=36\)। भाग देने से पहले गुणा करें या सरल करें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=\frac{n(n+1)}{2}\) है, तो \(a_8\) क्या होगा? / If \(a_n=\frac{n(n+1)}{2}\), what is \(a_8\)?

Correct Answer: C. (36). Explanation: \(a_8=\frac{8\cdot9}{2}=36\)। भाग देने से पहले गुणा करें या सरल करें। / \(a_8=\frac{8\cdot9}{2}=36\). Multiply or simplify before dividing.

Which concept should I revise for this Mathematics MCQ?

\(a_8=\frac{8\cdot9}{2}=36\). Multiply or simplify before dividing.

What exam hint can help solve this Mathematics question?

\(a_8=\frac{8\cdot9}{2}=36\)। भाग देने से पहले गुणा करें या सरल करें।