यदि \(a_1=10\) और (a_{n+1}=a_n+(-1)^{n+1}(n+2)) है तो \(a_5\) क्या होगा?

If \(a_1=10\) and (a_{n+1}=a_n+(-1)^{n+1}(n+2)), what is \(a_5\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (8)

Step 1

Concept

The terms are (10,13,9,14,8), so \(a_5=8\). Exam tip: check the sign at each step in alternating rules.

Step 2

Why this answer is correct

The correct answer is B. (8). The terms are (10,13,9,14,8), so \(a_5=8\). Exam tip: check the sign at each step in alternating rules.

Step 3

Exam Tip

पद (10,13,9,14,8) हैं इसलिए \(a_5=8\) है। चिह्न बदलने वाले नियम में हर चरण का संकेत देखें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=10\) और (a_{n+1}=a_n+(-1)^{n+1}(n+2)) है तो \(a_5\) क्या होगा? / If \(a_1=10\) and (a_{n+1}=a_n+(-1)^{n+1}(n+2)), what is \(a_5\)?

Correct Answer: B. (8). Explanation: पद (10,13,9,14,8) हैं इसलिए \(a_5=8\) है। चिह्न बदलने वाले नियम में हर चरण का संकेत देखें। / The terms are (10,13,9,14,8), so \(a_5=8\). Exam tip: check the sign at each step in alternating rules.

Which concept should I revise for this Mathematics MCQ?

The terms are (10,13,9,14,8), so \(a_5=8\). Exam tip: check the sign at each step in alternating rules.

What exam hint can help solve this Mathematics question?

पद (10,13,9,14,8) हैं इसलिए \(a_5=8\) है। चिह्न बदलने वाले नियम में हर चरण का संकेत देखें।