Find the sum of the finite geometric series. 4 20 100 ... 312,500 the sum of the geometric series is.

What is the 9th term of the geometric sequence 4, - 20, 100, ...

First term, a = 4

common ratio, r = - 20 / 4 = - 5

... = 100 / - 20 = - 5

9th term = 4 (-5) ^ (9 - 1)

... = 4 (-5) ^ 8

... = 4 (390,625)

... = 1,562,500