find the sum of 1/9+{-1/8}

Find the sum of G.P. : 1-(1)/(2)+(1)/(4)-(1)/(8)+ . . . .. . . .. . to 9 terms .

Find the sum 1-1/8+1/8xx3/(16)-(1xx3xx5)/(8xx16xx24)+

Find the sum: 1-1/8+1/8xx3/(16)-(1xx3xx5)/(8xx16xx24)+...

Find the sum of G.P. : 1+3+9+27+ . . . . .. . to 12 terms.

Find the sum: 5/9+\ 6+1 5/7

Find the sum (-4/9 + (-5)/12 + 1/18)

Find the sum of series 1+1/2+1/3+1/4+1/6+1/8+1/9+1/12+…… oo, where the term are the reciprocals of the positive integers whose only prime factors are two's and three's :

Find the sum of the sequence -(1)/(3),1,-3,9 , . . . . . . . Upto 8 terms.

Find the sum of the following geometric progression: 1,3,9,27,… to 8 terms.

Find the sum of the following series to infinity: 10-9+8. 1-7. 29+oo