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anonymous

  • one year ago

Help with iterates?

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  1. anonymous
    • one year ago
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    So the question is find the first three iterates of f(x)=-3x-7 if x0=-8

  2. anonymous
    • one year ago
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    Okay this is the first step I took. f(-8)=-3x-7 f(-8)=3x-8-7=30

  3. anonymous
    • one year ago
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    This is obviously wrong since it's not one of the iterates. xD

  4. anonymous
    • one year ago
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    @Hero @hartnn

  5. anonymous
    • one year ago
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    lol it would be -5

  6. anonymous
    • one year ago
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    . . .Why?

  7. welshfella
    • one year ago
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    -3(-8)- 7 = 24 - 7

  8. anonymous
    • one year ago
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    f(-8)=-3x-7 -15=-3x -15/-3=5 x=5

  9. anonymous
    • one year ago
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    opps not -5 it postive 5

  10. welshfella
    • one year ago
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    No its x0 = -8 so you plug in -8 to -3x - 7

  11. anonymous
    • one year ago
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    are you sure

  12. anonymous
    • one year ago
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    lol he right i jsut ask my math teacher

  13. anonymous
    • one year ago
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    good job

  14. welshfella
    • one year ago
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    so when x0 = -8 f(x) = 24-7 = 17 now for the next iterate you need to plug in x = 17 into -3x - 7

  15. anonymous
    • one year ago
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    So how do I plug in the second iterate would it be, f(17)=-8(17)-7=58?

  16. anonymous
    • one year ago
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    Or this f(17)=-3x(17)-7=58 @ Welsh

  17. anonymous
    • one year ago
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    @welshfella *

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