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The first and last term of a geometrical...

The first and last term of a geometrical Pregression (G.P.) are 3 and 96 respectively. If the common ratio is 2, find :
(i) 'n' the number of terms of the G.P.
(ii) Sum of the n terms.

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The correct Answer is:
(i) n = 6 (ii) 189
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