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  1. C

    Maxima Problem

    A piece of wire of length 120cm is bent to form a rectangle. Find the dimesions of the rectangle is the area is to be a maximum. I have no idea where to go with this one. Thanks
  2. C

    Calculus

    how would i make -(2x - 4)(x² - 4x – 5)^(-2) = 0 ?? I'm stuck. Thanks
  3. C

    Differentiation Question

    How would I differentiate: 2x² + 5x² -4x / x Thanks
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