यदि \(a_1=4\) और \(a_{n+1}=2a_n+5\) है तो \(a_4\) क्या होगा?
If \(a_1=4\) and \(a_{n+1}=2a_n+5\), what is \(a_4\)?
Explanation opens after your attempt
A. (61)
Concept
The terms are (4,13,31,67), so \(a_4=67\). The correct option should include (67).
Why this answer is correct
The correct answer is A. (61). The terms are (4,13,31,67), so \(a_4=67\). The correct option should include (67).
Exam Tip
पद (4,13,31,67) नहीं बल्कि \(a_4=67\) है। सही विकल्प में (67) होना चाहिए।
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