Question

If the first two terms of a geometric progression are 64 and 48 respectively. The first three terms of the geometric progression are also the 1st term,and the nth term respectively of an arithmetic progression . Find the value of n.

Answer 1

1st term = 64 , 2nd term = 48 , so r = 48/64= 3/4

So nth term = 64 x (3/4) ^n-1
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