A={x2-3x+2=o},B={x2-ax+(a-1)=0},c={x2-mx+2}.满足A∩B=B,A∪C=A,求a,m的值
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![A={x2-3x+2=o},B={x2-ax+(a-1)=0},c={x2-mx+2}.满足A∩B=B,A∪C=A,求a,m的值](/uploads/image/z/11679528-48-8.jpg?t=A%3D%7Bx2-3x%2B2%3Do%7D%2CB%3D%7Bx2-ax%2B%28a-1%29%3D0%7D%2Cc%3D%7Bx2-mx%2B2%7D.%E6%BB%A1%E8%B6%B3A%E2%88%A9B%3DB%2CA%E2%88%AAC%3DA%2C%E6%B1%82a%2Cm%E7%9A%84%E5%80%BC)
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A={x2-3x+2=o},B={x2-ax+(a-1)=0},c={x2-mx+2}.满足A∩B=B,A∪C=A,求a,m的值
A={x2-3x+2=o},B={x2-ax+(a-1)=0},c={x2-mx+2}.满足A∩B=B,A∪C=A,求a,m的值
A={x2-3x+2=o},B={x2-ax+(a-1)=0},c={x2-mx+2}.满足A∩B=B,A∪C=A,求a,m的值
A={x^2-3x+2=o}
A={x=2或者x=1}
B={x^2-ax+(a-1)=0}
x^2-ax+(a-1)=0
(x-a+1)(x-1)=0
B={x=a-1或者x=1}
因为A∩B=B,即B属于A
所以a-1=2或者a-1=1
a=3或者a=2
A∪C=A即C属于A
将x=2或者x=1代入x2-mx+2
得m=3