共50条信息
若\(U=\{1,2,3,4\}.A=\{1,2,3\}\),\(B=\{x|(x+1)(x-2) < 0,x∈N^{*}\}.\)则\(∁_{U}(A∩B)\)为\((\) \()\)
已知集合\(A=\{x|3\leqslant x < 7\}\),\(B=\{x|2 < x < 10\}\),则\((∁_{R}A)∩B=\)________.
若全集为实数集\(R\),集合\(A=\{x|{{\log }_{\frac{1}{2}}}(2x-1) > 0\}\),则\({{\complement }_{{R}}}A=(\) \()\)
若集合\(A=\left\{x|{\log }_{ \frac{1}{2}}x\geqslant \dfrac{1}{2}\right\} \),则\({C}_{R}A (\) \()\)
已知全集\(U=R\),集合\(A=\{x\left| {{x}^{2}} > 2x+3 \right.\}\),\(B=\{x\left| {{\log }_{3}}x > 1 \right.\}\),则下列关系正确的是
已知集合 \(A\)\(=\{ \)\(x\)\(|2\) \(a\)\(-2 < \) \(x\)\( < \) \(a\)\(\}\), \(B\)\(=\{ \)\(x\)\(|1 < \) \(x\)\( < 2\}\),且 \(A⊆ \)\(∁_{R}\) \(B\),求 \(a\)的取值范围.
设全集\(U=\{x|e^{x} > 1\}\),函数\(f(x)=\dfrac{1}{\sqrt{x-1}}\)的定义域为\(A\),则\(∁_{U}A\)为\((\) \()\)
已知全集\(U=\{0,1,2,4,6,8,10\}\),集合\(A=\{2,4,6\}\),\(B=\{1\}\),则\(∁_{U}A∪B\)等于\((\) \()\)
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