Ask Question
1 January, 21:54

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. 1 January, 22:03
    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 the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers