f(-1/2)
f(-1/2) = 1 -3(-1/2)/2 + (-1/2) = 1 + 3/4 - 1/2 = 5/4 but you probably meant f(x) = (1-3x)/(2+x) f(-1/2) = (1 - 3(-1/2))/( 2 + (-1/2)) = (5/2)/(3/2) = 5/3
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