Question

Help with iterates?

Answer 1

So the question is find the first three iterates of f(x)=-3x-7 if x0=-8

Answer 2

Okay this is the first step I took.
f(-8)=-3x-7
f(-8)=3x-8-7=30

Answer 3

This is obviously wrong since it's not one of the iterates. xD

Answer 4

@Hero @hartnn

Answer 5

lol it would be -5

Answer 6

. . .Why?

Answer 7

-3(-8)- 7 = 24 - 7

Answer 8

f(-8)=-3x-7
-15=-3x
-15/-3=5
x=5

Answer 9

opps not -5 it postive 5

Answer 10

No its x0 = -8
so you plug in -8 to -3x - 7

Answer 11

are you sure

Answer 12

lol he right i jsut ask my math teacher

Answer 13

good job

Answer 14

so when x0 = -8
f(x) = 24-7 = 17

now for the next iterate you need to plug in x = 17 into -3x - 7

Answer 15

So how do I plug in the second iterate would it be,
f(17)=-8(17)-7=58?

Answer 16

Or this f(17)=-3x(17)-7=58
@ Welsh

Answer 17

@welshfella *