Sum of n terms of the following series`1^3+3^3+5^3+7^3+`

Find the sum to n terms of the following (1-2) series: (i) 1+3/2+5/(2^(2))+7/(2^(3))+ ………….. (ii) 1+2/3+3/(3^(2))+4/(3^(3))+ …………

Find the sum of first n terms of the series 1^(3) + 3^(3) + 5^(3) +…

Find the sum of the following series to n term: 1^3+3^3+5^3+7^3+.........

Sum to n terms of the series 1^(3) - (1.5)^(3) +2^(3)-(2.5)^(3) +…. is

Sum of n terms of the series 1,3,7,15,31,dots... is