यदि \(a_1=2\), \(a_2=9\) और \(a_n=a_{n-1}+a_{n-2}\) है तो \(a_5\) क्या होगा?

If \(a_1=2\), \(a_2=9\), and \(a_n=a_{n-1}+a_{n-2}\), what is \(a_5\)?

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

C. (31)

Step 1

Concept

The terms are (2,9,11,20,31), so \(a_5=31\). Exam tip: write positions while adding previous two terms.

Step 2

Why this answer is correct

The correct answer is C. (31). The terms are (2,9,11,20,31), so \(a_5=31\). Exam tip: write positions while adding previous two terms.

Step 3

Exam Tip

पद (2,9,11,20,31) हैं इसलिए \(a_5=31\) है। पिछले दो पदों को जोड़ते समय क्रमांक लिखें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=2\), \(a_2=9\) और \(a_n=a_{n-1}+a_{n-2}\) है तो \(a_5\) क्या होगा? / If \(a_1=2\), \(a_2=9\), and \(a_n=a_{n-1}+a_{n-2}\), what is \(a_5\)?

Correct Answer: C. (31). Explanation: पद (2,9,11,20,31) हैं इसलिए \(a_5=31\) है। पिछले दो पदों को जोड़ते समय क्रमांक लिखें। / The terms are (2,9,11,20,31), so \(a_5=31\). Exam tip: write positions while adding previous two terms.

Which concept should I revise for this Mathematics MCQ?

The terms are (2,9,11,20,31), so \(a_5=31\). Exam tip: write positions while adding previous two terms.

What exam hint can help solve this Mathematics question?

पद (2,9,11,20,31) हैं इसलिए \(a_5=31\) है। पिछले दो पदों को जोड़ते समय क्रमांक लिखें।