अनुक्रम \(0,2,6,12,20,\ldots\) में (a_n=n(n-1)) है। \(a_{15}\) क्या है?

In the sequence \(0,2,6,12,20,\ldots\), (a_n=n(n-1)). What is \(a_{15}\)?

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Correct Answer

D. (210)

Step 1

Concept

\(a_{15}=15\times14=210\). Exam tip: substitute the term number for (n) in the formula.

Step 2

Why this answer is correct

The correct answer is D. (210). \(a_{15}=15\times14=210\). Exam tip: substitute the term number for (n) in the formula.

Step 3

Exam Tip

\(a_{15}=15\times14=210\) है। सूत्र में (n) की जगह पद संख्या रखें।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(0,2,6,12,20,\ldots\) में (a_n=n(n-1)) है। \(a_{15}\) क्या है? / In the sequence \(0,2,6,12,20,\ldots\), (a_n=n(n-1)). What is \(a_{15}\)?

Correct Answer: D. (210). Explanation: \(a_{15}=15\times14=210\) है। सूत्र में (n) की जगह पद संख्या रखें। / \(a_{15}=15\times14=210\). Exam tip: substitute the term number for (n) in the formula.

Which concept should I revise for this Mathematics MCQ?

\(a_{15}=15\times14=210\). Exam tip: substitute the term number for (n) in the formula.

What exam hint can help solve this Mathematics question?

\(a_{15}=15\times14=210\) है। सूत्र में (n) की जगह पद संख्या रखें।