优优班--学霸训练营 > 知识点挑题
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            • 1.

              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 \((\)    \()\)

              A.\(1\)             
              B.\(2\)               
              C.\(3\)               
              D.无数
            • 2. 若{1,2}⊆A⊆{1,2,3,4,5},则集合A的个数是(  )
              A.8
              B.7
              C.4
              D.3
            • 3.

              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\((\)  \()\)

              A.\(5\)                        
              B.\(6\)                                 
              C.\(7\)                       
              D.\(8\)
            • 4.

              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\((\)  \()\)

              A.\(m{\leqslant }3\)
              B.\(2{\leqslant }m{\leqslant }3\)
              C.\(m{\geqslant }2\)
              D.\(m{\geqslant }3\)
            • 5.

              设集合\(A=\left\{ (x,y)\left| \dfrac{{{x}^{2}}}{4}+\dfrac{{{y}^{2}}}{16}=1 \right. \right\}\),\(B=\left\{ (x,y)\left| y={{3}^{x}} \right. \right\}\),则\(A\cap B\)的子集的个数是\((\)   \()\)

              A.\(4\)            
              B.\(3\)           
              C.\(2\)            
              D.\(1\)
            • 6.

              已知\(e\)为自然对数的底数,若对任意的\(x\in [\dfrac{1}{e},1]\),总存在唯一的\(y\in [-1,1]\),使得\(\ln x-x+1+a={{y}^{2}}{{e}^{y}}\)成立,则实数\(a\)的取值范围是 

              A.\((\dfrac{2}{e},+\infty )\)
              B.\((\dfrac{2}{e},e+\dfrac{1}{e})\)
              C.\([\dfrac{1}{e},e]\)
              D.\((\dfrac{2}{e},e]\)
            • 7.

              已知集合\(M=\{0,1,2,3,4\}\),\(N=\{1,3,5\}\),\(P=M\bigcap N\),则\(P\)的子集共有

              A.\(2\)个
              B.\(4\)个
              C.\(6\)个
              D.\(8\)个
            • 8.

              已知集合\(A=\{0,1,2,3\},B=\{x|x-3 < 0\} \),则\(A\bigcap B\)真子集的个数为\((\)  \()\)

              A.\(5\)个         
              B.\(6\)个        
              C.\(7\)个         
              D.\(8\)个
            • 9.

              设集合\(A=\{x\left| a\leqslant x\leqslant a+2 \right.\}\) ,集合\(B=\left\{ \left.x \right|x < -1或x > 3\right\} \),分别就下列条件求实数\(a\) 的取值范围:

              \((1)A\bigcap B=A\) ;

              \((2)A\bigcap B\ne \phi \) .

            • 10. 已知集合\(A=\{x|mx^{2}-2x+m=0\}\)仅有两个子集,则实数\(m\)的取值构成的集合为\((\)  \()\)
              A.\(\{-1,1\}\)
              B.\(\{-1,0,1\}\)
              C.\(\{0,1\}\)
              D.\(\varnothing \)
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