求函数单调区间.急

问题描述:

求函数单调区间.急
f(x)=|x^2-3x+2|

f(x)=|(x-3/2)²+2-9/4|=|(x-3/2)²-1/4|=|(x-1)(x-2)|
(-∞,1]减
(1,3/2]增
(3/2,2]减
(2,+∞)增