The common ratio, last term and sum of n terms of a G.P. are 2, 128 and 255 respectively. Find the value of n.

If the first term, common ratio and the sum of first n terms of a G.P. be a, r and S_(n) respectively, find the value of S_(1) + S_(2) + S_(3) +….+S_(n) .

Find the common ratio of the G.P. whose first and last terms are 5 and (32)/(625) respectively and the sum of the G.P. is (5187)/(625) :

Find the common ratio of the GP whose first and last terms are 25 and (1)/(625) respectively and the sum of the GP is (19531)/(625) .

The first term and the last term of a GP are a and k respectively. If the number of terms be n, then n is equal to ( r to common ratio),

The first term and the last term of a GP are a and k respectively. If the number of terms be n, then n is equal to (r to common ratio)

The first and the last terms of a G.P are a and k respectively if the number of terms be n prove that n=1+(logk-loga)/(logr) where r is the common ratio

The sum of some terms of a GP is 315 whose first term and the common ratio are 5 and 2 respectively. Find the last term and the number of terms.