यदि \(a_1=4\) और \(a_{n+1}=2a_n+4n-1\) है तो \(a_4\) क्या होगा?
If \(a_1=4\) and \(a_{n+1}=2a_n+4n-1\), what is \(a_4\)?
Explanation opens after your attempt
C. (71)
Concept
The terms are (4,11,29,69), so \(a_4=69\). Exam tip: double first and then add (4n-1).
Why this answer is correct
The correct answer is C. (71). The terms are (4,11,29,69), so \(a_4=69\). Exam tip: double first and then add (4n-1).
Exam Tip
पद (4,11,29,69) हैं इसलिए \(a_4=69\) है। सही विकल्पों में (69) होना चाहिए।
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