अनुक्रम \(4,12,24,40,\ldots\) का सामान्य पद क्या है?

What is the general term of the sequence \(4,12,24,40,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. \(a_n=2n^2+2n\)

Step 1

Concept

\(2n^2+2n\) gives (4,12,24,40). In exams, check a quadratic rule when second differences are constant.

Step 2

Why this answer is correct

The correct answer is B. \(a_n=2n^2+2n\). \(2n^2+2n\) gives (4,12,24,40). In exams, check a quadratic rule when second differences are constant.

Step 3

Exam Tip

\(2n^2+2n\) से (4,12,24,40) मिलते हैं। परीक्षा में दूसरे अंतर समान हों तो वर्गीय नियम जाँचें।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(4,12,24,40,\ldots\) का सामान्य पद क्या है? / What is the general term of the sequence \(4,12,24,40,\ldots\)?

Correct Answer: B. \(a_n=2n^2+2n\). Explanation: \(2n^2+2n\) से (4,12,24,40) मिलते हैं। परीक्षा में दूसरे अंतर समान हों तो वर्गीय नियम जाँचें। / \(2n^2+2n\) gives (4,12,24,40). In exams, check a quadratic rule when second differences are constant.

Which concept should I revise for this Mathematics MCQ?

\(2n^2+2n\) gives (4,12,24,40). In exams, check a quadratic rule when second differences are constant.

What exam hint can help solve this Mathematics question?

\(2n^2+2n\) से (4,12,24,40) मिलते हैं। परीक्षा में दूसरे अंतर समान हों तो वर्गीय नियम जाँचें।