यदि \(a_1=3\), \(a_2=5\) और \(a_n=a_{n-1}+2a_{n-2}\) है तो \(a_4\) क्या होगा?

If \(a_1=3\), \(a_2=5\), and \(a_n=a_{n-1}+2a_{n-2}\), what is \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (21)

Step 1

Concept

\(a_3=5+2\times3=11\) and \(a_4=11+2\times5=21\). Exam tip: write positions while using two-term rules.

Step 2

Why this answer is correct

The correct answer is C. (21). \(a_3=5+2\times3=11\) and \(a_4=11+2\times5=21\). Exam tip: write positions while using two-term rules.

Step 3

Exam Tip

\(a_3=5+2\times3=11\) और \(a_4=11+2\times5=21\) है। दो-पद नियम में क्रमांक साथ लिखें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=3\), \(a_2=5\) और \(a_n=a_{n-1}+2a_{n-2}\) है तो \(a_4\) क्या होगा? / If \(a_1=3\), \(a_2=5\), and \(a_n=a_{n-1}+2a_{n-2}\), what is \(a_4\)?

Correct Answer: C. (21). Explanation: \(a_3=5+2\times3=11\) और \(a_4=11+2\times5=21\) है। दो-पद नियम में क्रमांक साथ लिखें। / \(a_3=5+2\times3=11\) and \(a_4=11+2\times5=21\). Exam tip: write positions while using two-term rules.

Which concept should I revise for this Mathematics MCQ?

\(a_3=5+2\times3=11\) and \(a_4=11+2\times5=21\). Exam tip: write positions while using two-term rules.

What exam hint can help solve this Mathematics question?

\(a_3=5+2\times3=11\) और \(a_4=11+2\times5=21\) है। दो-पद नियम में क्रमांक साथ लिखें।