Question

.) Find the sum of the first n terms of the geometric sequence for the values of a1and r.

n = 4, a1 = 228, r = 4.8



A. 25,167.476


B. 6575.52


C. 25,214.976


D. 31,790.496

Answer 1

\[S=ar ^{n-1}=228(4.8)^{4-1}\]

Answer 2

huh?

Answer 3

The formula I posted is for the sum of n terms of a geometric sequence. a = first term. r = common ratio. n = number of terms. I just filled in the numbers you gave. Now you need to pick up you calculator and find 4.8^3. Multiply that answer by 228 and you will be done.

Answer 4

sweet ty for explaining :)

Answer 5

yw