For GP `a=7, r=1/3` find `t_6`

If for a G.P., t_(3)=36 and t_(6) =972, then : t_(8) =

(i) Given a G.P. with a=729 and 7th term 64 find S_(7) . (ii) If {a_(n)} is a G.P. and a_(1)=4,r=5 , find a_(6) and S_(6) .

If for a G.P., r=2 and t_(9) =128, then : a=

If for a G.P., a=8 and t_(4) =64 then : r=

If, for a G.P., t_(3) =0.08 and t_(7) =0.000128, then : (a,r) -=

If for a G.P., r=2 and S_(8) =510, then : t_(3) =

Write first 6 terms of a G.P with a=3 and r=(1)/(3)

In a GP, t_4=27 and t_7=729 . Find t_(11) where t_n denotes the nth term.

If in a G.P., a3 + a5 = 90 and if r = 2 find the first term of the G.P.