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mathcalculus

where is everyone?!? help please! =( find the extrema: 4x^3-13x^2+4x+1 max and min: [1,4] [0,2]

  • one year ago
  • one year ago

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  1. mathcalculus
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    i put the answer: [1,4] max=65 min= -11 and for [0,2] max= 196 min= -11 what's wrong with the answer?

    • one year ago
  2. mathcalculus
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    i found the derivative..12x^2-26x+4

    • one year ago
  3. mathcalculus
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    then i factored: and got the critical points: x=1/6 and x=2

    • one year ago
  4. mathcalculus
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    then i evaluated f at each critical number

    • one year ago
  5. mathcalculus
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    and then evaluated f at each endpoints

    • one year ago
  6. mathcalculus
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    left point: critical points: Right point: f(1) -4 f(1/6)= 1.32407 f(4)= 65 f(0)=1 f(2)= -11 f(5)= 196

    • one year ago
  7. mathcalculus
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    now can anyone tell me what i did wrong with the answer? [1,4] max=65 min= -11 [0,2] max= 196 min= -11

    • one year ago
  8. mathcalculus
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    @hartnn :(

    • one year ago
  9. mathcalculus
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    @dan815

    • one year ago
  10. mathcalculus
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    @wio

    • one year ago
  11. dan815
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    iam here

    • one year ago
  12. hartnn
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    why you took f(5) ?

    • one year ago
  13. hartnn
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    range is [0,2] right ?

    • one year ago
  14. mathcalculus
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    sorry everyone.... hehe

    • one year ago
  15. hartnn
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    so for for [0,2] max= 1min= -11

    • one year ago
  16. dan815
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    i see nothing else wrong besides f(5)

    • one year ago
  17. mathcalculus
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    |dw:1363331661154:dw|

    • one year ago
  18. dan815
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    |dw:1363331762488:dw|

    • one year ago
  19. dan815
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    |dw:1363331811355:dw|

    • one year ago
  20. mathcalculus
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    |dw:1363331917359:dw|

    • one year ago
  21. dumbcow
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    hmm, critical points are x=1/6, 2 so local max/min are f(1/6) and f(2) max = f(1/6) = 1.3 min = f(2) = -11

    • one year ago
  22. dan815
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    |dw:1363331991812:dw|

    • one year ago
  23. dan815
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    u got one of those stupid owls

    • one year ago
  24. dan815
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    raised by bats

    • one year ago
  25. mathcalculus
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    ?

    • one year ago
  26. mathcalculus
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    |dw:1363332131809:dw|

    • one year ago
  27. dan815
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    thankyou for becoming my fan :D

    • one year ago
  28. dan815
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    as a gift id like to tell you the name of God is JESUS treasure it

    • one year ago
  29. mathcalculus
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    yup, i appreciate all the help.

    • one year ago
  30. mathcalculus
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    okay.....

    • one year ago
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