In an A.P, the sum of the first $n$ terms is $S_n = 2n^2 + 3n$. What is the $n$th term ($a_n$)?
University of Ilorin MTH101 2025A past question
- $4n + 1$
- $4n - 1$
- $2n + 3$
- $3n^2$
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