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Thread: Math homework help (should be easy for you cos I'm noob)

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    goodieboy's Avatar
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    Math homework help (should be easy for you cos I'm noob)

    It's the basics of Calculus, I think, need to use some differentiation

    Find the range of values of 'a' such that the gradient of the tangent to the curve y = (2x + a)/(4 - x^2) is always positive. ('a' is a constant here)

    I could get up to the point of dy/dx = (2x^2 + 2ax + 8)/((4 - x^2)^2), but can't go on after that.

    All help appreciated!
    Last edited by goodieboy; 12-10-2012 at 08:20 PM.

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