if f x 2f 1/x 3x, if f x + 2f 1/x 3x, f x + 2f 1/x 3x, if f x + 2f 1/x, if f x x 3-1/x 3, f x +f 1-x 1 f x 2f x/3, if f x +2f 1-x x 2+1, if f x+1 x 2-3x+2, f x x 3-x 2f' 1, f x+1 2f x, if f x 2+2x 1-x/3, 2f x +f 1-x x 2, 2f x +f x 2-1 1, f x 1/2 x + 3/2, f x f x-1 +2f x-2, f x 2f x-1 +1, f x+1 3f x, f x x-1 3 x-2 2
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