设集合A={(x,y)丨y=-4x+6},B={ (x,y)丨y=5x-3},求A∩B
问题描述:
设集合A={(x,y)丨y=-4x+6},B={ (x,y)丨y=5x-3},求A∩B
答
A∩B={(x,y)丨y=-4x+6}∩{ (x,y)丨y=5x-3}
={(x,y)丨y=-4x+6 且y=5x-3}
={(x,y)丨x=1,y=2}
={(1,2)}.