anonymous
  • anonymous
Help with iterates?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
So the question is find the first three iterates of f(x)=-3x-7 if x0=-8
anonymous
  • anonymous
Okay this is the first step I took. f(-8)=-3x-7 f(-8)=3x-8-7=30
anonymous
  • anonymous
This is obviously wrong since it's not one of the iterates. xD

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anonymous
  • anonymous
anonymous
  • anonymous
lol it would be -5
anonymous
  • anonymous
. . .Why?
welshfella
  • welshfella
-3(-8)- 7 = 24 - 7
anonymous
  • anonymous
f(-8)=-3x-7 -15=-3x -15/-3=5 x=5
anonymous
  • anonymous
opps not -5 it postive 5
welshfella
  • welshfella
No its x0 = -8 so you plug in -8 to -3x - 7
anonymous
  • anonymous
are you sure
anonymous
  • anonymous
lol he right i jsut ask my math teacher
anonymous
  • anonymous
good job
welshfella
  • welshfella
so when x0 = -8 f(x) = 24-7 = 17 now for the next iterate you need to plug in x = 17 into -3x - 7
anonymous
  • anonymous
So how do I plug in the second iterate would it be, f(17)=-8(17)-7=58?
anonymous
  • anonymous
Or this f(17)=-3x(17)-7=58 @ Welsh
anonymous
  • anonymous

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