1. \(S_n = A(1+nr)\)
2.\(S_n = A(1+r)^n\)
3.\(S_n = \dfrac{A}{r}[(1+r)^n-1](1+r)\)
4.\(S_n= A(1+r)^n- X \dfrac{(1+r)^n-1}{r}\)
5.\(\)\(S_n= A(1+r)^n- X \dfrac{(1+r)^n-1}{r}\)
6.\(S_{kn} = Ak \dfrac{(1+r)^k -1}{r}\)
7.\(S= Ae^{n.r}\)
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