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Math Help - Maximum value of the triangle

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    Maximum value of the triangle

    the max of the areas of the isosceles triangles lying between the curve y=e^-x and the x axis with base on the positive x axis is?
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    Quote Originally Posted by champrock View Post
    the max of the areas of the isosceles triangles lying between the curve y=e^-x and the x axis with base on the positive x axis is?
    base = x

    height = e^{-\frac{x}{2}}

    A = \frac{1}{2} x e^{-\frac{x}{2}}

    find \frac{dA}{dx} and maximize
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