यदि \(a_n=n^2+3n\) है, तो \(a_7\) का मान क्या होगा?
If \(a_n=n^2+3n\), what is the value of \(a_7\)?
Explanation opens after your attempt
B. (70)
Concept
(a_7=72+3(7)=70). Do the square and multiplication in order.
Why this answer is correct
The correct answer is B. (70). (a_7=72+3(7)=70). Do the square and multiplication in order.
Exam Tip
(a_7=72+3(7)=70)। वर्ग और गुणा को क्रम से करें।
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