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

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

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (43)

Step 1

Concept

The terms are (3,8,20,43), so \(a_4=43\). Exam tip: double the previous term first and then add (n+1).

Step 2

Why this answer is correct

The correct answer is C. (43). The terms are (3,8,20,43), so \(a_4=43\). Exam tip: double the previous term first and then add (n+1).

Step 3

Exam Tip

पद (3,8,20,43) हैं इसलिए \(a_4=43\) है। पहले पिछले पद को दोगुना करें फिर (n+1) जोड़ें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

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

Correct Answer: C. (43). Explanation: पद (3,8,20,43) हैं इसलिए \(a_4=43\) है। पहले पिछले पद को दोगुना करें फिर (n+1) जोड़ें। / The terms are (3,8,20,43), so \(a_4=43\). Exam tip: double the previous term first and then add (n+1).

Which concept should I revise for this Mathematics MCQ?

The terms are (3,8,20,43), so \(a_4=43\). Exam tip: double the previous term first and then add (n+1).

What exam hint can help solve this Mathematics question?

पद (3,8,20,43) हैं इसलिए \(a_4=43\) है। पहले पिछले पद को दोगुना करें फिर (n+1) जोड़ें।