集合A＝｛x｜x²≤4x｝x²-4x≤0 x（x-4）≤0 0≤x≤4集合B＝｛x｜3x－4＞0｝3x-4>0 ,3x＞4 ，x＞4/3A∩B=｛x｜4/3
x²≤4xx²-4x≤0x(x-4)≤00≤x≤43x－4＞03x>4x>4/3则A∩B＝｛x｜4/3
如图所示
