优优班--学霸训练营 > 知识点挑题
全部资源
          排序:
          最新 浏览

          50条信息

            • 1.

              若\(U=\{1,2,3,4\}.A=\{1,2,3\}\),\(B=\{x|(x+1)(x-2) < 0,x∈N^{*}\}.\)则\(∁_{U}(A∩B)\)为\((\)  \()\)

              A.\(\{1,3\}\)                      
              B.\(\{2,3\}\)

              C.\(\{3,4\}\)                                       
              D.\(\{2,3,4\}\)
            • 2. 已知全集\(U=R\),集合\(A\)为函数\(f(x)=\ln (x-1)\)的定义域,则 \(C_{U}A=\) ______ .
            • 3. 集\(U=\{x|x\leqslant 1\}\),\(A=\{x|-2\leqslant x\leqslant 1\}\),则\(∁_{U}A=(\)  \()\)
              A.\(\{x|x\leqslant -2\}\)
              B.\(\{x|x\leqslant -2\)或\(x\geqslant 1\}\)
              C.\(\{x|x < -2\}\)
              D.\(\{x|x < -2\)或\(x > 1\}\)
            • 4.

              已知集合\(A=\{x|3\leqslant x < 7\}\),\(B=\{x|2 < x < 10\}\),则\((∁_{R}A)∩B=\)________.

            • 5.

              若全集为实数集\(R\),集合\(A=\{x|{{\log }_{\frac{1}{2}}}(2x-1) > 0\}\),则\({{\complement }_{{R}}}A=(\)    \()\)

              A.\((\dfrac{1}{2},+\infty )\)
              B.\((1,+∞)\)
              C.\([0,\dfrac{1}{2}]\bigcup [1,+\infty ) \)
              D.\((-\infty ,\dfrac{1}{2}]\bigcup [1,+\infty )\)
            • 6.

              若集合\(A=\left\{x|{\log }_{ \frac{1}{2}}x\geqslant \dfrac{1}{2}\right\} \),则\({C}_{R}A (\)   \()\)

              A.\((-∞,0]∪( \dfrac{ \sqrt{2}}{2},+∞) \)
              B.\(( \dfrac{ \sqrt{2}}{2},+∞) \)
              C.\((-∞,0]∪[ \dfrac{ \sqrt{2}}{2},+∞) \)
              D.\([ \dfrac{ \sqrt{2}}{2},+∞) \)
            • 7.

              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

              A. \(A\bigcup {{C}_{U}}B=R\)
              B.\(B\bigcup {{C}_{U}}A=R\)
              C.\(A\bigcup B=R\)
              D.\(A∩B=A \)
            • 8.

              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.

            • 9.

              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\((\)   \()\)

              A.\((0,\ 1]\)
              B.\((0,\ 1)\)
              C.\((1,\ +\infty )\)
              D.\([1,\ +\infty )\)
            • 10.

              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\((\)  \()\)

              A.\(\{0,1,8,10\}\)    
              B.\(\{1,2,4,6\}\)         
              C.\(\{0,8,10\}\)   
              D.\(\varnothing \)
            0/40

            进入组卷