SOLUTION: find the sum of the geometric series. {{{sum( 12(-.7)^(i-1), i=1, infinity )}}}

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Question 153929: find the sum of the geometric series.
sum%28+12%28-.7%29%5E%28i-1%29%2C+i=1%2C+infinity+%29
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
find the sum of the geometric series.
sum%28+12%28-.7%29%5E%28i-1%29%2C+i=1%2C+infinity+%29
Use the formula:
sum%28+a%5B1%5Dr%5E%28i-1%29%2C+i=1%2C+infinity+%29=a%5B1%5D%2F%281-r%29

Edwin