यदि \(a_1=7\) और \(a_{n+1}=3a_n-2n\) है तो \(a_3\) क्या होगा?

If \(a_1=7\) and \(a_{n+1}=3a_n-2n\), what is \(a_3\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

D. (57)

Step 1

Concept

\(a_2=3\times7-2=19\) and \(a_3=3\times19-4=53\). Exam tip: when (n=2), subtract (4).

Step 2

Why this answer is correct

The correct answer is D. (57). \(a_2=3\times7-2=19\) and \(a_3=3\times19-4=53\). Exam tip: when (n=2), subtract (4).

Step 3

Exam Tip

\(a_2=3\times7-2=19\) और \(a_3=3\times19-4=53\) नहीं बल्कि \(a_3=53\) है। सही गणना में (n=2) पर (4) घटता है।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=7\) और \(a_{n+1}=3a_n-2n\) है तो \(a_3\) क्या होगा? / If \(a_1=7\) and \(a_{n+1}=3a_n-2n\), what is \(a_3\)?

Correct Answer: D. (57). Explanation: \(a_2=3\times7-2=19\) और \(a_3=3\times19-4=53\) नहीं बल्कि \(a_3=53\) है। सही गणना में (n=2) पर (4) घटता है। / \(a_2=3\times7-2=19\) and \(a_3=3\times19-4=53\). Exam tip: when (n=2), subtract (4).

Which concept should I revise for this Mathematics MCQ?

\(a_2=3\times7-2=19\) and \(a_3=3\times19-4=53\). Exam tip: when (n=2), subtract (4).

What exam hint can help solve this Mathematics question?

\(a_2=3\times7-2=19\) और \(a_3=3\times19-4=53\) नहीं बल्कि \(a_3=53\) है। सही गणना में (n=2) पर (4) घटता है।