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Evaluate the integral of abs(x) from -4 to 4.

  • Calc -

    graph f(x). It is just two triangles of base 4, height 4. No integration required.

    If you do insist on integrating, recognize that f(x) is a piecewise function, and must be divided at x=0.
    f(x) = -x for x<0
    f(x) = x for x>=0

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