यदि \(a_n=n^3+n\) है, तो \(a_4\) क्या होगा?
If \(a_n=n^3+n\), what is \(a_4\)?
Explanation opens after your attempt
C. (68)
Concept
Putting (n=4), \(a_4=4^3+4=68\). First find the cube, then add.
Why this answer is correct
The correct answer is C. (68). Putting (n=4), \(a_4=4^3+4=68\). First find the cube, then add.
Exam Tip
(n=4) रखने पर \(a_4=4^3+4=68\) है। पहले घन निकालें, फिर जोड़ करें।
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