यदि \(a_1=8\) और (a_{n+1}=a_n+2(-1)^n+n) है तो \(a_4\) क्या होगा?

If \(a_1=8\) and (a_{n+1}=a_n+2(-1)^n+n), what is \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (11)

Step 1

Concept

The terms are (8,7,11,12), so \(a_4=12\). Exam tip: track both the alternating sign part and (n).

Step 2

Why this answer is correct

The correct answer is B. (11). The terms are (8,7,11,12), so \(a_4=12\). Exam tip: track both the alternating sign part and (n).

Step 3

Exam Tip

पद (8,7,11,12) हैं इसलिए \(a_4=12\) है। चिह्न बदलने वाले भाग और (n) दोनों देखें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=8\) और (a_{n+1}=a_n+2(-1)^n+n) है तो \(a_4\) क्या होगा? / If \(a_1=8\) and (a_{n+1}=a_n+2(-1)^n+n), what is \(a_4\)?

Correct Answer: B. (11). Explanation: पद (8,7,11,12) हैं इसलिए \(a_4=12\) है। चिह्न बदलने वाले भाग और (n) दोनों देखें। / The terms are (8,7,11,12), so \(a_4=12\). Exam tip: track both the alternating sign part and (n).

Which concept should I revise for this Mathematics MCQ?

The terms are (8,7,11,12), so \(a_4=12\). Exam tip: track both the alternating sign part and (n).

What exam hint can help solve this Mathematics question?

पद (8,7,11,12) हैं इसलिए \(a_4=12\) है। चिह्न बदलने वाले भाग और (n) दोनों देखें।