已知非空集合A{x|x2+ax+12b=0}和B={x|x2-ax+b=0},满足(CRA)∩B={2},A∩(CRB)={4},请尽快解决要有计算过程
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![已知非空集合A{x|x2+ax+12b=0}和B={x|x2-ax+b=0},满足(CRA)∩B={2},A∩(CRB)={4},请尽快解决要有计算过程](/uploads/image/z/1658164-4-4.jpg?t=%E5%B7%B2%E7%9F%A5%E9%9D%9E%E7%A9%BA%E9%9B%86%E5%90%88A%7Bx%7Cx2%2Bax%2B12b%3D0%7D%E5%92%8CB%3D%7Bx%7Cx2-ax%2Bb%3D0%7D%2C%E6%BB%A1%E8%B6%B3%28CRA%29%E2%88%A9B%3D%7B2%7D%2CA%E2%88%A9%28CRB%29%3D%7B4%7D%2C%E8%AF%B7%E5%B0%BD%E5%BF%AB%E8%A7%A3%E5%86%B3%E8%A6%81%E6%9C%89%E8%AE%A1%E7%AE%97%E8%BF%87%E7%A8%8B)
已知非空集合A{x|x2+ax+12b=0}和B={x|x2-ax+b=0},满足(CRA)∩B={2},A∩(CRB)={4},请尽快解决要有计算过程
已知非空集合A{x|x2+ax+12b=0}和B={x|x2-ax+b=0},满足(CRA)∩B={2},A∩(CRB)={4},
请尽快解决
要有计算过程
已知非空集合A{x|x2+ax+12b=0}和B={x|x2-ax+b=0},满足(CRA)∩B={2},A∩(CRB)={4},请尽快解决要有计算过程
说明B里面有个根是2,A里面有个根是4.
X=4代入A,16+4a+12b=0
X=2代入B,4-2a+b=0
解得:
a=8/7,b=-12/7