Asked by richie

The sum of an inifinte geometric series is 4.5 and the first term is 3. Determine the common ratio.
A. 1/3
B. 3/4
C. -1/2
D. -3/4
Is it B?
Answered by oobleck
3/(1-r) = 9/2
2/3 = 1-r
r = 1/3
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