अनुक्रम \(2,6,12,20,\ldots\) में (a_n=n(n+1)) है। कौन सा पद (210) है?

In the sequence \(2,6,12,20,\ldots\), (a_n=n(n+1)). Which term is (210)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (14)वाँ(14)th

Step 1

Concept

Since \(14\times15=210\), it is the (14)th term. Exam tip: look for products of consecutive numbers.

Step 2

Why this answer is correct

The correct answer is A. (14)वाँ / (14)th. Since \(14\times15=210\), it is the (14)th term. Exam tip: look for products of consecutive numbers.

Step 3

Exam Tip

\(14\times15=210\) इसलिए यह (14)वाँ पद है। लगातार संख्याओं के गुणनफल को ध्यान से देखें।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(2,6,12,20,\ldots\) में (a_n=n(n+1)) है। कौन सा पद (210) है? / In the sequence \(2,6,12,20,\ldots\), (a_n=n(n+1)). Which term is (210)?

Correct Answer: A. (14)वाँ / (14)th. Explanation: \(14\times15=210\) इसलिए यह (14)वाँ पद है। लगातार संख्याओं के गुणनफल को ध्यान से देखें। / Since \(14\times15=210\), it is the (14)th term. Exam tip: look for products of consecutive numbers.

Which concept should I revise for this Mathematics MCQ?

Since \(14\times15=210\), it is the (14)th term. Exam tip: look for products of consecutive numbers.

What exam hint can help solve this Mathematics question?

\(14\times15=210\) इसलिए यह (14)वाँ पद है। लगातार संख्याओं के गुणनफल को ध्यान से देखें।