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Let there be a GP whose first term is a and the common ratio is r. If A and H are the arithmetic mean and mean respectively for the first n terms of the G P, A. H is equal to

A

`a^2 r^(n-1)`

B

`ar^n`

C

`a^2 r^n`

D

`ar^(n-1)`

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The correct Answer is:
A
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