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k such that f(x) = kx para 0 <= x <= 3 and f(x) = x+1 para 3 < x <= 10 seja contínua em x = 3
k such that f(x) = kx para 0 <= x <= 3 and f(x) = x+1 para 3 < x <= 10 seja contínua em x = 3
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