What is the sum of the first five terms of a geometric series with a1 = 20 and r = 1/4?

Question

asked May 3, 2017 47.8k views

2 Answers

Edgar Henriquez · Answer 1 · 2017-05-09T18:42:54+0000

sum of the first n terms of a geometric sequence is Sn = a(1 - r^n)/(1 - r)
Sn = 20(1 - (1/4)^5)/(1 - 1/4) = 20(1 - 1/1024)/(3/4) = 20(1023/1024)/(3/4) = 26 41/64

What is the sum of the first five terms of a geometric series with a1 = 20 and r = 1/4?

Please log in or register to add a comment.

Please log in or register to answer this question.

2 Answers

Please log in or register to add a comment.

Please log in or register to add a comment.

No related questions found

Categories

Other Questions