The formula to find the sum of an A.P is...
University of Ilorin MTH101 kadesh past question
- \( S_n = \frac{n}{2}(a + (n-1)d) \)
- \( S_n = \frac{n}{2}[2a + (n-1)d] \)
- \( S_n = \frac{n}{2}(2a + n(a + 1)d) \)
- None of these
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