यदि \(a_1=4\) और \(a_{n+1}=a_n+3n-1\) है तो \(a_4\) क्या होगा?
If \(a_1=4\) and \(a_{n+1}=a_n+3n-1\), what is \(a_4\)?
Explanation opens after your attempt
C. (19)
Concept
The terms are (4,6,11,19), so \(a_4=19\). Exam tip: (3n-1) has a new value at each step.
Why this answer is correct
The correct answer is C. (19). The terms are (4,6,11,19), so \(a_4=19\). Exam tip: (3n-1) has a new value at each step.
Exam Tip
पद (4,6,11,19) हैं इसलिए \(a_4=19\) है। (3n-1) का मान हर चरण में नया होता है।
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