If S be the sum to infinity of a GP, whose first term is a, then the sum of first n terms is
1
\(S\left(1 - \frac{a}{S}\right)^n\)
2
\(S\left[1 - \left(1 - \frac{a}{S}\right)^n\right]\)
3
\(a\left[1 - \left(1 - \frac{a}{S}\right)^n\right]\)
4
None of these