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

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

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (23)

Step 1

Concept

\(a_6=\frac{6\times7}{2}+2=23\). In exams add (2) to the triangular number.

Step 2

Why this answer is correct

The correct answer is B. (23). \(a_6=\frac{6\times7}{2}+2=23\). In exams add (2) to the triangular number.

Step 3

Exam Tip

\(a_6=\frac{6\times7}{2}+2=23\) है। परीक्षा में त्रिभुज संख्या में (2) जोड़ें।

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Mathematics Answer, Explanation and Revision Hints

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

Correct Answer: B. (23). Explanation: \(a_6=\frac{6\times7}{2}+2=23\) है। परीक्षा में त्रिभुज संख्या में (2) जोड़ें। / \(a_6=\frac{6\times7}{2}+2=23\). In exams add (2) to the triangular number.

Which concept should I revise for this Mathematics MCQ?

\(a_6=\frac{6\times7}{2}+2=23\). In exams add (2) to the triangular number.

What exam hint can help solve this Mathematics question?

\(a_6=\frac{6\times7}{2}+2=23\) है। परीक्षा में त्रिभुज संख्या में (2) जोड़ें।