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The fourth, seventh, and the last term o...

The fourth, seventh, and the last term of a G.P. are 10, 80, and 2560, respectively. Find the first term and the number of terms in G.P.

A

`(4)/(5),12`

B

`(4)/(5),10`

C

`(5)/(4),12`

D

`(5)/(4),10`

Text Solution

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The correct Answer is:
B
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