Question

What are the first five partial sums of the arithmetic series: an = 0.05(n-1)-0.6?
-0.6,- 0.55, -0.5, -0.45, -0.4

-0.6, -1.15, -1.65, -2.1, -2.5

-0.6, -1.15, -1.05, -0.95, -0.85

- 0.6, -1.15, -1.65, -2.1, -2.5

What are the first five partial sums of the geometric series: a^n = (5/8)* 3^n-1?
0.625, 1.875, 5.625, 16.875, 50.625

1.875, 3.75, 7.5, 13.1250, 20.625

2.5, 4.375, 10, 26.875, 77.5

0.625, 2.5, 8.125, 25, 75.625