Asked by anonymous
how do i find the common ratio of the infinite geometric ratio series with the given sum and first term?
for example:
sum=4
first term=7
for example:
sum=4
first term=7
Answers
Answered by
Reiny
sum = a/(1-r)
4 = 7/(1-r)
4-4r = 7
-4r = 3
r = -3/4
4 = 7/(1-r)
4-4r = 7
-4r = 3
r = -3/4
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