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18 June, 13:56

What is the sum of the first 8 terms of the geometric series: 3+6+12+24+

0765

382

286

440

+5
Answers (1)
  1. 18 June, 14:14
    0
    765.

    Step-by-step explanation:

    Sum of n terms = a1 (r^n - 1) / (r - 1) where a1 = the first term and r = the common ratio.

    Here r = 6/3 = 2 and a1 = 3.

    Sum of 8 terms = 3 * (2^8 - 1) / 2 - 1)

    = 3 * 255

    = 765 (answer).
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