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In an infinite geometric series the firs...

In an infinite geometric series the first term is `a` and common ratio is `r`. If the sum of the series is 4 and the seond term is `3/4`, then `(a, r)` is

A

`(4/7,3/7)`

B

`(2,3/8)`

C

`(3/2,1/2)`

D

`(3,1/4)`

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The correct Answer is:
D
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