यदि \(a_1=3\) और \(a_{n+1}=a_n+3^n+n^2\) है तो \(a_3\) क्या होगा?
If \(a_1=3\) and \(a_{n+1}=a_n+3^n+n^2\), what is \(a_3\)?
Explanation opens after your attempt
Correct Answer
B. (20)
Concept
The terms are (3,7,20), so \(a_3=20\). Exam tip: add both \(3^n\) and \(n^2\).
Why this answer is correct
The correct answer is B. (20). The terms are (3,7,20), so \(a_3=20\). Exam tip: add both \(3^n\) and \(n^2\).
Exam Tip
पद (3,7,20) हैं इसलिए \(a_3=20\) है। \(3^n\) और \(n^2\) दोनों जोड़ें।
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