(1+1/3). (3+1/9), (5+ 1/27) ,.....(19+1/3^10)S10 = (1+3+5+...+19) + ( 1/3+1/3^2+...+1/3^10) = 100 + (1/2)( 1- 1/3^10) = 23737697/118098
