What is the value of σ^3(4*(1/2)^i-1) i=1 ? a.7/8 b.8 c.7/2 d.7

we are given

we can expand it

now, we can combine it

and we get

............Answer

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation: