यदि \(a_1=2\), \(a_2=3\) और \(a_n=a_{n-1}+2a_{n-2}+n\) है तो \(a_4\) क्या होगा?

If \(a_1=2\), \(a_2=3\), and \(a_n=a_{n-1}+2a_{n-2}+n\), what is \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (20)

Step 1

Concept

\(a_3=3+2\times2+3=10\) and \(a_4=10+2\times3+4=20\). Exam tip: do not forget to add the current (n).

Step 2

Why this answer is correct

The correct answer is C. (20). \(a_3=3+2\times2+3=10\) and \(a_4=10+2\times3+4=20\). Exam tip: do not forget to add the current (n).

Step 3

Exam Tip

\(a_3=3+2\times2+3=10\) और \(a_4=10+2\times3+4=20\) है। वर्तमान (n) भी जोड़ना न भूलें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=2\), \(a_2=3\) और \(a_n=a_{n-1}+2a_{n-2}+n\) है तो \(a_4\) क्या होगा? / If \(a_1=2\), \(a_2=3\), and \(a_n=a_{n-1}+2a_{n-2}+n\), what is \(a_4\)?

Correct Answer: C. (20). Explanation: \(a_3=3+2\times2+3=10\) और \(a_4=10+2\times3+4=20\) है। वर्तमान (n) भी जोड़ना न भूलें। / \(a_3=3+2\times2+3=10\) and \(a_4=10+2\times3+4=20\). Exam tip: do not forget to add the current (n).

Which concept should I revise for this Mathematics MCQ?

\(a_3=3+2\times2+3=10\) and \(a_4=10+2\times3+4=20\). Exam tip: do not forget to add the current (n).

What exam hint can help solve this Mathematics question?

\(a_3=3+2\times2+3=10\) और \(a_4=10+2\times3+4=20\) है। वर्तमान (n) भी जोड़ना न भूलें।