已知集合A =丨x丨x²-5x-6=0丨,集合B=丨x丨x²-x-6=0丨,全集U={-2,-1,0,3,6},求A∪B,A∩B,如题 求速回
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![已知集合A =丨x丨x²-5x-6=0丨,集合B=丨x丨x²-x-6=0丨,全集U={-2,-1,0,3,6},求A∪B,A∩B,如题 求速回](/uploads/image/z/1252855-55-5.jpg?t=%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A+%3D%E4%B8%A8x%E4%B8%A8x%26%23178%3B-5x-6%3D0%E4%B8%A8%2C%E9%9B%86%E5%90%88B%3D%E4%B8%A8x%E4%B8%A8x%26%23178%3B-x-6%3D0%E4%B8%A8%2C%E5%85%A8%E9%9B%86U%3D%7B-2%2C-1%2C0%2C3%2C6%7D%2C%E6%B1%82A%E2%88%AAB%2CA%E2%88%A9B%2C%E5%A6%82%E9%A2%98+%E6%B1%82%E9%80%9F%E5%9B%9E)
已知集合A =丨x丨x²-5x-6=0丨,集合B=丨x丨x²-x-6=0丨,全集U={-2,-1,0,3,6},求A∪B,A∩B,如题 求速回
已知集合A =丨x丨x²-5x-6=0丨,集合B=丨x丨x²-x-6=0丨,全集U={-2,-1,0,3,6},求A∪B,A∩B,
如题 求速回
已知集合A =丨x丨x²-5x-6=0丨,集合B=丨x丨x²-x-6=0丨,全集U={-2,-1,0,3,6},求A∪B,A∩B,如题 求速回
A:(x-6)(x+1)=0;
x=6或x=-1;
B:(x-3)(x+2)=0;
x=3或x=-2;
∴A∪B={-1,-2,3,6}
A∩B=空集;
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