共50条信息
已知集合\(A{=}\{ x{|}x^{2}{-}3x{ < }0\}{,}B{=}\{ x{|}x{ > }2\}\),则集合\(A{∩}({{∁}}_{R}B){=}({ })\)
实数集\(R\),设集合\(P{=}\{ x{|}x^{2}{-}4x{+}3{\leqslant }0\}{,}Q{=}\{ x{|}x^{2}{-}4{ < }0\}\),则\(P{∪}({{∁}}_{R}Q){=}({ })\)
设全集\(U=R\),集合\(A{=}\left\{ x\left| {{\log }_{2}}x\leqslant 1 \right. \right\}\),\(B=\left\{ x\left| {{x}^{2}}+x-2\geqslant 0 \right. \right\}\),则\(A∩{∁}_{U}B= \) \((\) \()\)
设集合 \(A=\{ 1,2,3,4,5,6\}\),\(B=\{x|2 < x < 5\}\),则\(A∩(∁_{R}B)=(\) \()\)
若集合\(M=\left\{x|y=\lg \dfrac{2-x}{x}\right\},N=\left\{x|x < 1\right\} \),则\(M∩{C}_{R}N \) \((\) \()\)
已知集合\(A=\{x|3\leqslant x < 7\}\),\(B=\{x|2 < x < 9\}\),则\(({{C}_{U}}A)\cap B=(\) \()\)
已知全集\(U=A\bigcup B=\{x\in Z\left| 0\leqslant x\leqslant 6\} \right.\),\(A\bigcap ({{C}_{U}}B)=\{1,3,5\}\),则\(B=(\) \()\)
设全集\(U=R\),\(A=\{x|y=\sqrt{2x-{{x}^{2}}}\}\),\(B=\{y|y={{2}^{x}},x\in R\}\),则\(({C}_{R}A)∩B= \)
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