यदि \(a_1=4\) और (a_{n+1}=a_n+2(-1)^n) है तो \(a_3\) क्या होगा?

If \(a_1=4\) and (a_{n+1}=a_n+2(-1)^n), what is \(a_3\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (4)

Step 1

Concept

The terms are (4,2,4), so \(a_3=4\). Exam tip: check the sign of ((-1)^n) at every step.

Step 2

Why this answer is correct

The correct answer is B. (4). The terms are (4,2,4), so \(a_3=4\). Exam tip: check the sign of ((-1)^n) at every step.

Step 3

Exam Tip

पद (4,2,4) हैं इसलिए \(a_3=4\) है। ((-1)^n) के चिह्न को हर चरण में जाँचें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=4\) और (a_{n+1}=a_n+2(-1)^n) है तो \(a_3\) क्या होगा? / If \(a_1=4\) and (a_{n+1}=a_n+2(-1)^n), what is \(a_3\)?

Correct Answer: B. (4). Explanation: पद (4,2,4) हैं इसलिए \(a_3=4\) है। ((-1)^n) के चिह्न को हर चरण में जाँचें। / The terms are (4,2,4), so \(a_3=4\). Exam tip: check the sign of ((-1)^n) at every step.

Which concept should I revise for this Mathematics MCQ?

The terms are (4,2,4), so \(a_3=4\). Exam tip: check the sign of ((-1)^n) at every step.

What exam hint can help solve this Mathematics question?

पद (4,2,4) हैं इसलिए \(a_3=4\) है। ((-1)^n) के चिह्न को हर चरण में जाँचें।