अनुक्रम \(3,18,43,78,\ldots\) के लिए सही सामान्य पद कौन-सा है?

Which general term is correct for the sequence \(3,18,43,78,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. \(a_n=5n^2-2\)

Step 1

Concept

\(5n^2-2\) gives (3,18,43,78). In exams check a quadratic rule when second differences are constant.

Step 2

Why this answer is correct

The correct answer is A. \(a_n=5n^2-2\). \(5n^2-2\) gives (3,18,43,78). In exams check a quadratic rule when second differences are constant.

Step 3

Exam Tip

\(5n^2-2\) से (3,18,43,78) मिलते हैं। परीक्षा में दूसरे अंतर समान देखकर वर्गीय नियम जाँचें।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(3,18,43,78,\ldots\) के लिए सही सामान्य पद कौन-सा है? / Which general term is correct for the sequence \(3,18,43,78,\ldots\)?

Correct Answer: A. \(a_n=5n^2-2\). Explanation: \(5n^2-2\) से (3,18,43,78) मिलते हैं। परीक्षा में दूसरे अंतर समान देखकर वर्गीय नियम जाँचें। / \(5n^2-2\) gives (3,18,43,78). In exams check a quadratic rule when second differences are constant.

Which concept should I revise for this Mathematics MCQ?

\(5n^2-2\) gives (3,18,43,78). In exams check a quadratic rule when second differences are constant.

What exam hint can help solve this Mathematics question?

\(5n^2-2\) से (3,18,43,78) मिलते हैं। परीक्षा में दूसरे अंतर समान देखकर वर्गीय नियम जाँचें।