यदि \(a_1=3\) और \(a_{n+1}=a_n+3^n+n^2\) है तो \(a_4\) क्या होगा?
If \(a_1=3\) and \(a_{n+1}=a_n+3^n+n^2\), what is \(a_4\)?
Explanation opens after your attempt
B. (52)
Concept
The added values are (4,13,36), so \(a_4=56\). Exam tip: calculate the power and square separately.
Why this answer is correct
The correct answer is B. (52). The added values are (4,13,36), so \(a_4=56\). Exam tip: calculate the power and square separately.
Exam Tip
जुड़ने वाले मान (4,13,36) हैं इसलिए \(a_4=56\) नहीं बल्कि (56) है। घात और वर्ग अलग-अलग निकालें।
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