यदि \(a_1=2\) और \(a_{n+1}=a_n+n\) है तो \(a_4\) क्या होगा?
If \(a_1=2\) and \(a_{n+1}=a_n+n\), what is \(a_4\)?
Explanation opens after your attempt
C. (8)
Concept
The terms are (2,3,5,8), so \(a_4=8\). Exam tip: the value of (n) changes at each step.
Why this answer is correct
The correct answer is C. (8). The terms are (2,3,5,8), so \(a_4=8\). Exam tip: the value of (n) changes at each step.
Exam Tip
पद (2,3,5,8) हैं इसलिए \(a_4=8\) है। यहाँ (n) का मान हर चरण में बदलता है।
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