यदि \(a_1=3\) और \(a_{n+1}=2a_n+n^2\) है तो \(a_5\) क्या होगा?
If \(a_1=3\) and \(a_{n+1}=2a_n+n^2\), what will \(a_5\) be?
Explanation opens after your attempt
Correct Answer
B. (91)
Concept
The terms are (3,7,18,45,91), so \(a_5=91\). Exam tip: \(n^2\) changes at each recursive step.
Why this answer is correct
The correct answer is B. (91). The terms are (3,7,18,45,91), so \(a_5=91\). Exam tip: \(n^2\) changes at each recursive step.
Exam Tip
पद (3,7,18,45,91) मिलते हैं इसलिए \(a_5=91\) है। पुनरावर्ती नियम में \(n^2\) हर चरण बदलता है।
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