यदि \(a_1=2\) और \(a_{n+1}=2a_n+n\) है तो \(a_4\) का मान क्या होगा?
If \(a_1=2\) and \(a_{n+1}=2a_n+n\), what is the value of \(a_4\)?
Explanation opens after your attempt
C. (27)
Concept
The terms are (2,5,12,27), so \(a_4=27\). Exam tip: double the previous term first and then add (n).
Why this answer is correct
The correct answer is C. (27). The terms are (2,5,12,27), so \(a_4=27\). Exam tip: double the previous term first and then add (n).
Exam Tip
पद (2,5,12,27) हैं इसलिए \(a_4=27\) है। पहले पिछले पद को दोगुना करें फिर (n) जोड़ें।
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