यदि \(a_1=200\) और (a_{n+1}=a_n-\(3^n+n\)) है तो \(a_4\) क्या होगा?
If \(a_1=200\) and (a_{n+1}=a_n-\(3^n+n\)), what is \(a_4\)?
Explanation opens after your attempt
A. (155)
Concept
The subtracted values are (4,11,30), so \(a_4=155\). Exam tip: first calculate the full value of \(3^n+n\).
Why this answer is correct
The correct answer is A. (155). The subtracted values are (4,11,30), so \(a_4=155\). Exam tip: first calculate the full value of \(3^n+n\).
Exam Tip
घटने वाले मान (4,11,30) हैं इसलिए \(a_4=155\) है। \(3^n+n\) को पहले पूरा निकालें।
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