SOLUTION: find the sum of infinity geometry sequence of 1. -4, -1, -1/4, - 1/6 2. 24, 4, 2/3, 1/9

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Question 977673: find the sum of infinity geometry sequence of
1. -4, -1, -1/4, - 1/6
2. 24, 4, 2/3, 1/9
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
Formula for Sum to Infinity = a/(1 - r)

a(1) = -4 r = 1/4
a) Sum = -4/(1 - 1/4) = -4/(3/4) = -5.33 (2 decimal places)
.......................................
a(1) = 24 r = 1/6
b) Sum = 24/(1 - 1/6) = 24/(5/6) = 28.8
.......................................
Hope this helps :-)