यदि \(a_1=2\) और \(a_{n+1}=2a_n+3n-1\) है तो \(a_4\) क्या होगा?
If \(a_1=2\) and \(a_{n+1}=2a_n+3n-1\), what is \(a_4\)?
Explanation opens after your attempt
C. (42)
Concept
The terms are (2,6,17,42), so \(a_4=42\). Exam tip: (3n-1) changes at every step.
Why this answer is correct
The correct answer is C. (42). The terms are (2,6,17,42), so \(a_4=42\). Exam tip: (3n-1) changes at every step.
Exam Tip
पद (2,6,17,42) हैं इसलिए \(a_4=42\) है। (3n-1) का मान हर चरण में नया होता है।
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