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已知A={a|不等式x2+2ax+4>0在x∈R上恒成立},且(1)若k=1,求A∩CRB...
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已知A={a|不等式x
2+2ax+4>0在x∈R上恒成立},且
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAH8AAAAjCAYAAAC98dWfAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(1)若k=1,求A∩C
RB;
(2)若C
RA⊊C
RB,求实数k的取值范围.
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已知A={a|不等式x2+2ax+4>0在x∈R上恒成立},且
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAH8AAAAjCAYAAAC98dWfAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAL/SURBVHhe7ZiJlYQgDIatzJ5sx2YsxVJYEg45
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xeyhQ/AOOQAAAABJRU5ErkJggg==
)
(1)若k=1,求A∩CRB;
(2)若CRA⊊CRB,求实数k的取值范围.
-
已知A={a|不等式x2+2ax+4>0在x∈R上恒成立},且
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAH8AAAAjCAYAAAC98dWfAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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)
(1)若k=1,求A∩CRB;
(2)若CRA⊊CRB,求实数k的取值范围.
-
已知函数
的定义域为集合A,函数y=log2(x2-4x+12)的值域为集合B,
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①函数f(x)=lg(x2-2ax+a2-a+1)的定义域为R;
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