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March 26, 2017

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find the intervals on which the function is increasing or decreasing and find any relative minima or maxima.
f(x)=0.2x^3-0.2x^2-5x-4

  • College Alg - ,

    f=1/5 (x+4)(x^2 - 5x - 5)
    f' = .6x^2 - .4x - 5
    f'=0 at x = 1/3 (1 ± 2√19)

    f increases where f' > 0

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