" The sum to infinity of the progression "9-3+1-(1)/(3)+

The sum of infinity of the progression 9-3+1-(1)/(3)+… is

If the sum to infinity of the series 1- ( 1+d) (1)/(3) +(1+ 2d) (1)/(9) -( 1+3d) .(1)/( 27) + ………" is" (9)/(16) , find d.

Find the sum to infinity of this geometric progression. 1,1/2,1/2^2,1/2^3,……

The sum to infinity of the series : 1+2 ( 1-(1)/( n )) + 3( 1 - ( 1)/( n ))^(2) +"...." is :

If the sum to infinity of the series 3 + (3 + d). (1)/(4) + (3 + 2d) (1)/(4^(2)) + ..... " is " (44)/(9) then find d

If the sum to infinity of the series 3+(3+d) (1)/(4) +(3+2d) (1)/(4^(2))+cdots oo is (44)/(9) then find d.

In the sum to infinity of the series 3+(3+x) (1)/(4) + (3+2x)(1)/(4^(2))+ ..... "is" (44)/(9) find x.

If the sum to infinity of the series : 1-(1+d)xx1/3+(1+2d)xx1/9 -(1+3d)xx1/27+ ......... is 9/16 , find d .

If the sum to infinity of the series: 1-(1+d)((1)/(3))+(1+2d)((1)/(9))-(1+3d)((1)/(27))+ is (9)/(16) then find d