共50条信息
满足条件\(\{1,2,3\}\subset \ne M\subset \ne \{1,2,3,4,5,6\}\)的集合\(M\)的个数是 \((\) \()\)
下列集合中,是集合\(A=\left\{ \left.x \right|{x}^{2} < 5x\right\} \)的真子集的是( )
\(A=\left\{ x\left| x(x-2)\geqslant 0,x\in R \right. \right\},B=\left\{ x\left| {{\log }_{2}}x > 1,x\in R \right. \right\}\),则“\(x\in A\)”是“\(x\in B\)”\((\) \()\)
设集合\(A=\{m\in \mathbf{R}|\)幂函数\(f\left( x \right)=\left( {{m}^{2}}-3m+3 \right){{x}^{{{m}^{2}}-m-2}}\)的图象不过原点\(\}\),则集合\(A\)的真子集的个数为 \((\) \()\)
已知集合\(A=\{0,1,2,3,4\}\),\(B=\{x|x=\sqrt{n},n\in A\}\),则\(A∩B\)的真子集个数为\((\) \()\)
已知集合\(A{=}\{ x{|-}2{\leqslant }x{\leqslant }5\}\),\(B{=}\{ x{|}m{+}1{\leqslant }x{\leqslant }2m{-}1\}{.}\)若\(B{⊆}A\),则实数\(m\)的取值范围为\((\) \()\)
函数\(f(x)=x^{3}-ax^{2}+2x\)在实数集\(R\)上单调递增的一个充分不必要条件是\((\) \()\)
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