已知p:-1≤2x-3≤7 q:(x-m+1)(x-m-1)≤0,若¬p是¬q充分而不必要条件,求实数m的取值范围.( )
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已知函数f(x)=|x|x-2ax+b(x∈R).给出下列命题:
①f(x)可能是奇函数;
②f(x)可能是偶函数;
③当f(0)=f(2)时f(x)的图象必关于x=1对称;
④f(x)在(a,+∞)上是增函数
其中正确命题的序号是
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以双曲线
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=1的焦点为顶点,顶点为焦点的椭圆方程是
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若关于x的不等式ax
2-6x+a
2<0的解集是(1,m),则m=
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双曲线
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=1一条渐近线方程是y=
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x,则其离心率为
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设g(x)=
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若g(x)≥1,则x取值范围是
..
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