Ask Question
21 September, 09:20

What is the sum of the geometric sequence - 4, 24, - 144, ... if there are 7 terms? A) 308,829 B) - 159,964 C) - 411,772 D) 119,973.

+3
Answers (1)
  1. 21 September, 10:35
    0
    Sum of the geometric sequence:

    S n = a * (1 - r^n) / (1 - r)

    a = - 4 (the 1st term of the sequence), r = - 6, n = 7

    S 7 = ( - 4) * (1 - ( - 6) ^7) / 1 - ( - 6) = ( - 4) * 279937 / 7 = - 159,964

    Answer: B)
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “What is the sum of the geometric sequence - 4, 24, - 144, ... if there are 7 terms? A) 308,829 B) - 159,964 C) - 411,772 D) 119,973. ...” 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