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The sum of an infinite geometric progres...

The sum of an infinite geometric progression (G.P.) is 2 and the sum of the G.P. made from the cubes of the terms of this infinite series is 24. The values a nad r respectively (where is the first term and r denote common ratio of the series)

A

-2, 3

B

3, -1/2

C

0, 1/2

D

can't be determined

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The correct Answer is:
B
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