共50条信息
已知集合\(A=\{x|x < 1\}\),\(B=\{x|{{3}^{x}} < 1\}\),则( )
\(4.\)已知集合\(A\)\(=\{1,3, \sqrt{m}\}\),\(B\)\(=\{1,\)\(m\)\(\}\),\(A\)\(∪\)\(B\)\(=\)\(A\),则\(m\)\(=(\) \()\)
设全集\(U=R\),集合\(A=\left\{ x|-1\leqslant x < 3 \right\}\),\(B=\left\{ x|2x-4\geqslant x-2 \right\}\)
\((1)\)求\({{C}_{U}}(A\bigcap B)\);
\((2)\)若集合\(C=\{x|2x+a > 0\}\),满足\(B\bigcup C=C\),求实数\(a\)的取值范围.
已知集合 \(A=\)\(\{ \)\(x|x-a > \)\(0\}\), \(B=\)\(\{ \)\(x|\)\(2\) \(-x < \)\(0\}\),且 \(A\)\(∪\) \(B=B\),则实数 \(a\)满足的条件是 .
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