document.write( "Question 451874: Problem: f(x) = (3x -1)/ (x + 4)= Domain (- infinity, -4) u (-4, infinity)\r
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Algebra.Com's Answer #310683 by robertb(5830)\"\" \"About 
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Considering only the highest powers for the numerator and denominator, the function is reduced to \"%283x%29%2Fx+=+3\". Letting x approach \"infinity\", f(x) then approaches 3, and hence the horizontal asymptote is y = 3.\r
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