U={x|x 2-3x+2≥0 }={x|(x-1)(x-2)≥0}={x|x≤1,或 x≥2},
A={x|(x-1)(x-3)>0}={x|x<1,或x>3},
B= {x|
x-1
x-2 ≥0} = {x|
(x-1)(x-2)≥0
x-2≠0 ={x|x≤1,或 x>2}.
(1)A∩B={x|x<1,或x>3}∩{x|x≤1,或 x>2}={x|x<1,或 x>3}.
(2)A∪B={x|x<1,或x>3}∪{x|x≤1,或 x>2}={x|x≤1,或 x>2}.
(3)( C UA)∪( C UB)=C U (A∩B )={x|x=1,或 3≥x≥2}.
(4)( C UA)∩( C UB)=C U ( A∪B )={x|x=2}={2}.