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If the sum of the first n terms of the s...

If the sum of the first n terms of the series `a + ar + ar^(2) +…+ ar^(n-1) +… oo` is `(a)/(1-r)`, then -

A

`-1 lt r lt 1`

B

`-1 le r lt 1`

C

`-1 lt r le 1`

D

`-1 le r le 1`

Text Solution

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The correct Answer is:
A
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