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Math Help - find absolute minimum and maximum

  1. November 1st 2009, 10:22 AM #1
    frozenflames
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    find absolute minimum and maximum

    X^4-72X^2+1 ON INTERVAL [-5, 13].....FIND ABSOLUTE MINIMUM and absolute maximum


    I know i need the f'

    but i am struggling

    any help would be appreciated!!
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  2. November 2nd 2009, 03:26 PM #2
    Media_Man
    Media_Man is offline
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    f'(x)=4x^3-144x

    Does this help?

    *Remember, (x^n)'=nx^{n-1}
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