यदि \(a_1=2\) और \(a_{n+1}=a_n+n+1\) है तो \(a_4\) क्या होगा?
If \(a_1=2\) and \(a_{n+1}=a_n+n+1\), what is \(a_4\)?
Explanation opens after your attempt
Correct Answer
C. (11)
Concept
The terms are (2,4,7,11), so \(a_4=11\). Exam tip: (n+1) changes at every step.
Why this answer is correct
The correct answer is C. (11). The terms are (2,4,7,11), so \(a_4=11\). Exam tip: (n+1) changes at every step.
Exam Tip
पद (2,4,7,11) हैं इसलिए \(a_4=11\) है। (n+1) हर चरण में बदलता है।
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