The points shown on the graph represent the numbers in a geometric sequence.

On a coordinate plane, 3 points are plotted. The points are (1, 2), (2, 4), (3, 8).

What is the initial value of the sequence?

A) 1
B) 2
C) 3
D) 8

2

Step-by-step explanation:

2 is the initial value of the sequence because the it is (1,2)

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

if this is really you s much. i only have 3 points left and i have 2 questions to ask