अनुक्रम \(3,5,8,12,\ldots\) का सामान्य पद क्या है?

What is the general term of the sequence \(3,5,8,12,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (a_n=\frac{n(n+1)}{2}+2)

Step 1

Concept

(\frac{n(n+1)}{2}+2) gives (3,5,8,12). In exams think of triangular numbers when differences are (2,3,4).

Step 2

Why this answer is correct

The correct answer is B. (a_n=\frac{n(n+1)}{2}+2). (\frac{n(n+1)}{2}+2) gives (3,5,8,12). In exams think of triangular numbers when differences are (2,3,4).

Step 3

Exam Tip

(\frac{n(n+1)}{2}+2) से (3,5,8,12) मिलते हैं। परीक्षा में बढ़ते अंतर (2,3,4) देखकर त्रिभुज संख्या सोचें।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(3,5,8,12,\ldots\) का सामान्य पद क्या है? / What is the general term of the sequence \(3,5,8,12,\ldots\)?

Correct Answer: B. (a_n=\frac{n(n+1)}{2}+2). Explanation: (\frac{n(n+1)}{2}+2) से (3,5,8,12) मिलते हैं। परीक्षा में बढ़ते अंतर (2,3,4) देखकर त्रिभुज संख्या सोचें। / (\frac{n(n+1)}{2}+2) gives (3,5,8,12). In exams think of triangular numbers when differences are (2,3,4).

Which concept should I revise for this Mathematics MCQ?

(\frac{n(n+1)}{2}+2) gives (3,5,8,12). In exams think of triangular numbers when differences are (2,3,4).

What exam hint can help solve this Mathematics question?

(\frac{n(n+1)}{2}+2) से (3,5,8,12) मिलते हैं। परीक्षा में बढ़ते अंतर (2,3,4) देखकर त्रिभुज संख्या सोचें।