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Math Help - Stationary points?

  1. #1
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    Stationary points?

    Got a question Im not too sure about D;

    1.a) y= (2x+3)(x-2)(x+1)
    i) Sketch the graph ( I know how to do this )
    ii) State the domain over which the function is decreasing.

    Please explain it, Thanks.
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  2. #2
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    Quote Originally Posted by Klutz View Post
    Got a question Im not too sure about D;

    1.a) y= (2x+3)(x-2)(x+1)
    i) Sketch the graph ( I know how to do this )
    ii) State the domain over which the function is decreasing.

    Please explain it, Thanks.
    function is decreasing over the intervals where y' < 0
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  3. #3
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    so is it where the gradient is negative?
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  4. #4
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    Quote Originally Posted by Klutz View Post
    so is it where the gradient is negative?
    That is what post #2 said.
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