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Thread: For what interval(s) is the following function increasing and decreasing?

  1. November 28th 2008, 08:06 AM #1
    gnarlycarly227
    gnarlycarly227 is offline
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    For what interval(s) is the following function increasing and decreasing?

    For what interval(s) is the following function increasing and decreasing?
    y= x^3 + x^2 - 5x- 6

    and what window did you use?
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  2. November 28th 2008, 08:16 AM #2
    running-gag
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    y'(x)=3x²+2x-5=(3x+5)(x-1)
    You just have to find the sign of y'(x)
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