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k que torna f(x) = \begincases (x^2+3x+2)/(x+2), x != -2 }, {k, x=-2 \endcases contínua
k que torna f(x) = \begincases (x^2+3x+2)/(x+2), x != -2 }, {k, x=-2 \endcases contínua
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