Iam having problem with these set of ! if you get them correctly you will earn 15 !

1.) what is the common ratio for the geometric sequence 1/256, 1/32, 1/4, 2,

6
2.) what is the sum of the series ∑ (-3k+20)
k=3

step-by-step explanation:

in the absence of parentheses, i will have to make some assumptions:   i interpret your (3x+5/y^6)(4y^3/5)​ to mean:

3x + 5     4y^(3/5)       (3x + 5)(4)

* =

    y^6             1               y^(6-3/5)

if this is not what you expected, repost your question using parentheses to indicate whether you meant

4y^3

    or   4y^(3/5)

    5

50

step-by-step explanation: