函数y=㏒1/2(x²-3x+2)的单调递减区间y=log1/2(x)是单调递减函数；x²-3x+2≥0;(x-1)(x-2)＞0;x＞2或x＜1；x²-3x+2=(x-3/2)²-1/4;对称轴x=3/2;∴x∈（2,+∞﹚时；单调递增；x∈(-∞,1）时；单调递...