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sm101

  • 3 years ago

Can someone help me please!? Evaluate the piecewise-defined function for the given values. If f(x) = x for x ≥ 0 x2 for x < 0 , find f(5), f(6), f(−2), and f(−3).

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  1. sm101
    • 3 years ago
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    x2 = x^2

  2. mark_o.
    • 3 years ago
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    @ sm101 for x>=0 what is f(x)=? then what is f(5)=? and f(6)=?

  3. sm101
    • 3 years ago
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    I don't know... ??

  4. mark_o.
    • 3 years ago
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    for x>=0 what is f(x)=? it is f(x)=x just use the formula given then what is f(5)=? and f(6)=?.... f(5)=x and f(6)=6..

  5. mark_o.
    • 3 years ago
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    next f(x)=x^2 for x<o use this formula for x<0 w/c is x=-2 and x=-3 therefore f(−2)=___?), and f(−3).=___?

  6. sm101
    • 3 years ago
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    ok.. I'll try

  7. mark_o.
    • 3 years ago
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    ok good just plug into the formula f(x)=x^2 right?

  8. sm101
    • 3 years ago
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    |dw:1354063436337:dw|

  9. sm101
    • 3 years ago
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    in case you had trouble reading the question ^

  10. sm101
    • 3 years ago
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    I'm not sure how to substitute the f(5) and to come up with a solution

  11. mark_o.
    • 3 years ago
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    ok the picewise prob means that for x>=0 the formula you have to use is f(x)=x and for x<0 the formula you have to use is f(x)=x^2

  12. mark_o.
    • 3 years ago
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    that is for the piecewise formula here If f(x) = x for x ≥ 0 =x2 for x < 0

  13. mark_o.
    • 3 years ago
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    . If f(x) = x for x ≥ 0, the given are x=5 and x=6, therefore f(5)=5 and f(6)=6 now for f(x) =x^2 for x < 0, the given are x=-2 and x=-3 therefore f(x) =x^2 f(-2)=___? and f(-3)=___?

  14. sm101
    • 3 years ago
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    f(-2)=-2^2 and f(-3)=-3^2 ?

  15. mark_o.
    • 3 years ago
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    yes correct.... :D

  16. mark_o.
    • 3 years ago
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    just complete the answer what is (-2)^2=__?and (-3)^2=__?

  17. sm101
    • 3 years ago
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    -2^2 = 4 and -3^2 = 9

  18. sm101
    • 3 years ago
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    right?

  19. mark_o.
    • 3 years ago
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    justa remember for piecewise no matter how many formula they use ,, used them all :D

  20. mark_o.
    • 3 years ago
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    yess correct :D

  21. sm101
    • 3 years ago
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    yes! let me see if this works

  22. sm101
    • 3 years ago
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    what is f(5) and f(6) though?

  23. mark_o.
    • 3 years ago
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    use the formula for f(x)>=0 ,,,f(x)=x therefore f(5)+__? and f(6)=___? look up there and read, what we have done up there before.... :D

  24. sm101
    • 3 years ago
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    I did.. but I'm confused lol f(5)+? f(6)=6

  25. mark_o.
    • 3 years ago
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    yes sorry that was f(5)=___? :D yess you are correct f(6)=6

  26. sm101
    • 3 years ago
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    ok so f(5) = 5, I know this part, but then how to i find the answer?

  27. sm101
    • 3 years ago
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    where do i plug in the 5 and 6?

  28. mark_o.
    • 3 years ago
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    yes you are correct, and that was the answer already .... :D

  29. mark_o.
    • 3 years ago
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    plug into f(x)=x therefore f(5)=__? and f(6)=__?

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