यदि \(a_1=4\) और \(a_{n+1}=3a_n+n\) है तो \(a_4\) क्या होगा?
If \(a_1=4\) and \(a_{n+1}=3a_n+n\), what is \(a_4\)?
Explanation opens after your attempt
C. (126)
Concept
The terms are (4,13,41,126), so \(a_4=126\). Exam tip: find \(3a_n\) first and then add (n).
Why this answer is correct
The correct answer is C. (126). The terms are (4,13,41,126), so \(a_4=126\). Exam tip: find \(3a_n\) first and then add (n).
Exam Tip
पद (4,13,41,126) हैं इसलिए \(a_4=126\) है। हर चरण में पहले \(3a_n\) निकालें फिर (n) जोड़ें।
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