The first three terms of a geometric sequence are 27,-9, and3 (a) Write down the value of the common ratio r.
(b) Find u5
(c) Find the sum to infinity of the sequence.

what is the model?

step-by-step explanation:

hello,

as we don't know if g(x) is continue,

answer b

f(x)=2x²-8x+1=2(x²-4x+4)+1-8=2(x-2)²-7

vertex is (2,-7) ( a minimum since coefficient of x² is > 0)

where is the graph

step-by-step explanation: