यदि \(a_1=3\) और \(a_{n+1}=2a_n+2n+1\) है तो \(a_4\) क्या होगा?

If \(a_1=3\) and \(a_{n+1}=2a_n+2n+1\), what is \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

B. (49)

Step 1

Concept

The terms are (3,9,23,53), so \(a_4=53\). The correct option should include (53).

Step 2

Why this answer is correct

The correct answer is B. (49). The terms are (3,9,23,53), so \(a_4=53\). The correct option should include (53).

Step 3

Exam Tip

पद (3,9,23,53) हैं इसलिए \(a_4=53\) है। सही विकल्प में (53) होना चाहिए।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=3\) और \(a_{n+1}=2a_n+2n+1\) है तो \(a_4\) क्या होगा? / If \(a_1=3\) and \(a_{n+1}=2a_n+2n+1\), what is \(a_4\)?

Correct Answer: B. (49). Explanation: पद (3,9,23,53) हैं इसलिए \(a_4=53\) है। सही विकल्प में (53) होना चाहिए। / The terms are (3,9,23,53), so \(a_4=53\). The correct option should include (53).

Which concept should I revise for this Mathematics MCQ?

The terms are (3,9,23,53), so \(a_4=53\). The correct option should include (53).

What exam hint can help solve this Mathematics question?

पद (3,9,23,53) हैं इसलिए \(a_4=53\) है। सही विकल्प में (53) होना चाहिए।