1.

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)

Answer»

A. `-2,3`
B. `3, -1/2`
C. `0, 1/2`
D. can't be determined

Answer :B


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