यदि \(a_1=8\) और (a_{n+1}=a_n+2(-1)^n+n) है तो \(a_3\) क्या होगा?
If \(a_1=8\) and (a_{n+1}=a_n+2(-1)^n+n), what is \(a_3\)?
Explanation opens after your attempt
C. (11)
Concept
\(a_2=8-2+1=7\) and \(a_3=7+2+2=11\). Exam tip: the sign of ((-1)^n) changes at each step.
Why this answer is correct
The correct answer is C. (11). \(a_2=8-2+1=7\) and \(a_3=7+2+2=11\). Exam tip: the sign of ((-1)^n) changes at each step.
Exam Tip
\(a_2=8-2+1=7\) और \(a_3=7+2+2=11\) है। ((-1)^n) का चिह्न हर चरण में बदलता है।
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