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[单选题]
已知函数y=x2-2x+3在区间[0,m]上有最大值3,最小值2,则m的取值范围是
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[单选题]
已知f(x)=2x3-6x2+a(a是常数)-,在[-2,2]上有最大值3,那么在[-2,2]上的最小值是
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[单选题]
设全集U={1,2,3,4,5,6,7},集合A={1,3,5,7},B={3,5},则
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[单选题]
由全体奇数所组成的集合是
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[单选题]
设全集U={0,1,2,3,4},M={0,1,2,3},N={0,3,4}
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[单选题]
已知全集U={0,1,2,3,4,5,6,7,8,9},集合A={0,1,3,5,8},集合B={2,4,5,6,8}
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[单选题]
已知全集U{0,1,2,3,4},集合A{1,2,3},B {2,4}
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[单选题]
集合M={x|Igx>0},N={x|x2≤4},则M∩N=
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[单选题]
已知集合A={1,2,3,4,5},B={(x,y)|x∈A ,y∈A,x-y∈A};则B中所含元素的个数为
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[单选题]
设集合A={x|1<x<4},集合b ={x|2x-2x-3≤0}