calculus

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f(x)= 7-5x^4

How would find the the absolute max and the x value?

I think you have to take the derivative which is
-20x^3
but then I am lost??

  • calculus -

    set it to zero.
    f(x)=0=-20x^3 which means max occurs at zero. THe absolute max must then be
    f(0)=7-0

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