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Consider an infinite geometric series wi...

Consider an infinite geometric series with first term a and common ratio r. If its sum is 4 and the second term is `( 3)/( 4)` , then `:`

A

a=(4)/(7), r=(3)/(7)`

B

` a=2, r=(3)/(8) `

C

`a=(3)/(2), r=(1)/(2)`

D

`a=3, r=(1)/(4)`

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The correct Answer is:
D
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