Find the sum of the infinite geometric series `1+3x+9x^2+27x^3+…..`

Find the sum of the infinite geometric series (1+1/3+1/9+1/27+...oo) .

Find the sum of the following geometric series: x^3, x^5, x^7, to\ n terms

Find the sum of the infinite series 1.3/2+ 3.5/2^2+ 5.7/2^3+ 7.9/2^4+.......oo

Find the sum of the following geometric series: 2/9-1/3+1/2-3/4+ to\ 5\ terms.

What is the sum of the infinite geometric series whose first two terms are 3 and 1?

Find the sum to ininity of the series 1-3x+5x^2+7x^3+..... oo when Ix| <1.

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

Find the sum of first n terms and the sum of first 5 terms of the geometric series 1 + 2/3 + 4/9 +dotdotdot

The sum of an infinite geometric series with positive terms is 3 and the sums of the cubes of its terms is (27)/(19) . Then the common ratio of this series is

Find the sum of the following algebraic expressions : 3x^(3) - 5x^(2) + 2x + 1 , 3x - 2x^(3) - x^(3) , 2x^(2) - 7x + 9