find the sum of each series given the following information: first 15 terms in series created by t(n)=-3n+10

Consider the sum represented by 5∑n=1(20−3n). Write out the terms in the related series. (Your answer should start 17+....)

Find the sum of the geometric series: 1/3 + 1/6 + 1/12 +...............+1/1536 Round answer to two decimal places.

1 1 18 6 1 2. Find the sum of the first 5 terms of the geometric series