यदि (a_n=\frac{n(n+5)}{2}) है, तो \(a_7\) क्या होगा?

If (a_n=\frac{n(n+5)}{2}), what is \(a_7\)?

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

C. (42)

Step 1

Concept

(a_7=\frac{7(12)}{2}=42). Multiply or simplify before dividing.

Step 2

Why this answer is correct

The correct answer is C. (42). (a_7=\frac{7(12)}{2}=42). Multiply or simplify before dividing.

Step 3

Exam Tip

(a_7=\frac{7(12)}{2}=42)। भाग देने से पहले गुणा करें या सरल करें।

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Mathematics Answer, Explanation and Revision Hints

यदि (a_n=\frac{n(n+5)}{2}) है, तो \(a_7\) क्या होगा? / If (a_n=\frac{n(n+5)}{2}), what is \(a_7\)?

Correct Answer: C. (42). Explanation: (a_7=\frac{7(12)}{2}=42)। भाग देने से पहले गुणा करें या सरल करें। / (a_7=\frac{7(12)}{2}=42). Multiply or simplify before dividing.

Which concept should I revise for this Mathematics MCQ?

(a_7=\frac{7(12)}{2}=42). Multiply or simplify before dividing.

What exam hint can help solve this Mathematics question?

(a_7=\frac{7(12)}{2}=42)। भाग देने से पहले गुणा करें या सरल करें।