Algebra 2 work help with sequences?

1.35/8, 245/32, 1715/128, 12205/512 9th term geometric and equation for this?2.Geometric means of 5 and 3203.Positive geometric means of 5 and 3204.2+4+22+4+6+4+22+4+ . . . + (2N-4+2N)+(2N-2) + .... +2Find the 15th row5.3+ 3/2 +3/4 + 3/8 + 3/16 + ....Sum infinite Geometric Sequencegot 1 ****** question

yup. . . you're screwed.

5.) 3+3/2+3/4+3/8+3/16r = 1/2 and a = 3S inf = a/1-rS inf = 3 /(1-1/2) = 6 ANS1.)35/8, 245/32, 1715/128, 12205/512 r = (245/32) / (35/8) = 7/49th is ar^8 = (35/8)(7/4)^8 ANS2.) 5,x, 320r^2 = 320/5 = 64 then r = +-8x = 5*(+-8) = +- 40 ANS3.) + 40 ANS4.) 2+4+ . . . + (2N-4+2N)+(2N-2) + .... +2 in mid is 6N-6if N =15 then 2+4+6+12+....+84+...+12+6+4+2