|x²-4x+2|≥x/2（1）当x²-4x+2≥0,即：x≤2-√2或x≥2+√2时|x²-4x+2|= x²-4x+2≥x/2故：x²-9x/2+2≥0故：x≥4或x≤1/2 (结合x≤2-√2或x≥2+√2)故：x≥4或x≤1/2(2) 当x²-4x+2≤0,...