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The fourth ;seventh and last terms of a ...

The fourth ;seventh and last terms of a GP are 10; 80 and 2560 respectively . Find the first term and the no. of terms in the GP.

A

`(4)/(5),12`

B

`(4)/(5),10`

C

`(5)/(4),12`

D

`(5)/(4),10`

Text Solution

Verified by Experts

The correct Answer is:
B
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