यदि \(a_1=10\) और \(a_{n+1}=\frac{a_n}{2}+n\) है तो \(a_4\) क्या होगा?

If \(a_1=10\) and \(a_{n+1}=\frac{a_n}{2}+n\), what is \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

D. (8.5)

Step 1

Concept

The terms are (10,6,5,5.5), so \(a_4=5.5\). Exam tip: halve first and then add (n).

Step 2

Why this answer is correct

The correct answer is D. (8.5). The terms are (10,6,5,5.5), so \(a_4=5.5\). Exam tip: halve first and then add (n).

Step 3

Exam Tip

पद (10,6,5,5.5) नहीं बल्कि \(a_4=5.5\) है। आधा करने के बाद (n) जोड़ें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=10\) और \(a_{n+1}=\frac{a_n}{2}+n\) है तो \(a_4\) क्या होगा? / If \(a_1=10\) and \(a_{n+1}=\frac{a_n}{2}+n\), what is \(a_4\)?

Correct Answer: D. (8.5). Explanation: पद (10,6,5,5.5) नहीं बल्कि \(a_4=5.5\) है। आधा करने के बाद (n) जोड़ें। / The terms are (10,6,5,5.5), so \(a_4=5.5\). Exam tip: halve first and then add (n).

Which concept should I revise for this Mathematics MCQ?

The terms are (10,6,5,5.5), so \(a_4=5.5\). Exam tip: halve first and then add (n).

What exam hint can help solve this Mathematics question?

पद (10,6,5,5.5) नहीं बल्कि \(a_4=5.5\) है। आधा करने के बाद (n) जोड़ें।