For a GP if `t_3=18. t_6=486` find `S_5`

If for a G.P. , t_(8) :t_(3) =32 and S_(9) =255, then : t_(1) =

If for a G.P. { t_(n)},t_(2) =-6 and t_(5) =48 find S_(7) .

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

If for a G.P. { t_(n)}, S_(2) =15 and S_(4) =255, find a and r.

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

If for a G.P. { t_(n)}, t_(7) : t_(4) =27 and S_(5) =242, and t_(3) .

In a G.P if T_2+T_6=25/2 , T_3T_5=25 then find value of T_2+T_6+T_8

Sequence {t_(n)} of positive terms is a G.P If t_(6)2,5,t_(14) form another G.P in that order then the product t_(1)t_(2)t_(3).........t_(18)t_(19) is equal to

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