नियम \(a_n=n^2+2n\) से \(a_4\) क्या होगा?
What will \(a_4\) be for the rule \(a_n=n^2+2n\)?
Explanation opens after your attempt
C. (24)
Concept
Putting (n=4), (a_4=42+2(4)=24). Handle the power and multiplication carefully.
Why this answer is correct
The correct answer is C. (24). Putting (n=4), (a_4=42+2(4)=24). Handle the power and multiplication carefully.
Exam Tip
(n=4) रखने पर (a_4=42+2(4)=24) है। घात और गुणा दोनों ध्यान से करें।
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