Question

find sum of n terms of gp:1³/1 +(1³+2³)2+(1³+2³+3³)/3 .....​

Answer 1

Answer:

1/1+(1+8)2+(1+8+27)/3

1/1+2+16+1+8+27/3

1/1+27+27/3

1/1+54/3=19