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The sum of an infinite geometric series ...

The sum of an infinite geometric series is 162 and the sum of its first `n` terms is 160. If the inverse of its common ratio is an integer, then which of the following is not a possible first term? `108` b. `144` c. `160` d. none of these

A

1

B

2

C

4

D

5

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The correct Answer is:
D
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