Ask Question
19 October, 21:58

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

+2
Answers (1)
  1. 19 October, 23:39
    0
    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
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “What is the sum of the first five terms of a geometric series with a1 = 20 and r = 1/4? ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers