When expressing a geometric series, S base n is used. Identify an equivalent means of expressing a geometric series for n terms.(1 point) Responses ∪nn=1 union underscript n equals 1 overscript n End Scripts Πnn=1 upper pi underscript n equals 1 overscript n End Scripts ∑nn=1 sigma-summation underscript n equals 1 overscript n End Scripts ∩nn=1