Find `S_n` of the following arithmatical geometric sequence. `3, 6x`, `9x^2`, `12x^3`, `15x^4`, ……

Find Sn of the following arithmatics geometric sequence 3, 12, 36, 96, 240 ……

Find Sn of the following arithmatics geometric sequence 1, 4x, 7x^2 , 10x^3 , 13x^4 , ……

Find Sn of the following arithmatics geometric sequence 2, 4x, 6x^2 , 8x^3 , 10x^4 , ……

Find S_n of the following arithmatical geometric sequence. 3, 7 xx 3 , 11 xx 9 , 15 xx 27 , 19 xx 81 , …..

Find S_n of the following arithmatical geometric sequence. 2 xx 1 , 4 xx 3 , 6 xx 9 , 8 xx 27 , 10 xx 81 …..

Find S_n of the following arithmatical geometric sequence. 1, 2 xx 2 , 3 xx 4 , 4 xx 8 , 5 xx 16 , 6 xx 32 , …..

Find Sn of the following arithmatics geometric sequence 1, 2 xx 3 , 3 xx 9 , 4 xx 27 , 5 xx 81 …….

Find the sum to infinity of the following arithmetic geometric sequence. 3, 6/5, 9/25, 12/125, 15/625

Find if sum to infinity of the following arithmatic geometric sequence. 1, 2/3, 3/9, 4/27, 5/81 , …..

Find if sum to infinity of the following arithmatic geometric sequence. 3, 5/4, 7/16, 9/64, 11/256 , …..