यदि \(a_1=1\) और \(a_{n+1}=a_n+3^n+n\) है तो \(a_4\) क्या होगा?
If \(a_1=1\) and \(a_{n+1}=a_n+3^n+n\), what is \(a_4\)?
Explanation opens after your attempt
C. (46)
Concept
The added values are (4,11,30), so \(a_4=46\). Exam tip: add both \(3^n\) and (n).
Why this answer is correct
The correct answer is C. (46). The added values are (4,11,30), so \(a_4=46\). Exam tip: add both \(3^n\) and (n).
Exam Tip
जुड़ने वाले मान (4,11,30) हैं इसलिए \(a_4=46\) है। \(3^n\) और (n) दोनों जोड़ें।
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