共50条信息
已知集合\(A=\{1,2^{m} \}\),\(B=\{0,2\}.\)若\(A∪B=\{0,1,2,8\}\),则实数\(m\)的值为 .
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 .
.已知全集\(U=\)\(R\),集合\(A=\)\(\{\)\(x|\)\(2\)\(x\)\({\,\!}^{2}\)\(-x-\)\(6\geqslant 0\}\),\(B=\)\(\left\{ \left.x \right| \dfrac{1-x}{x-3}\geqslant 0\right\} \),则\(A\)\(∪\)\(B=\) .
已知集合 \(A=\)\(\{ \)\(x|x > \)\(0\}\), \(B=\)\(\{ \)\(x|-\)\(1\leqslant \) \(x\)\(\leqslant 2\}\),则 \(A\)\(∪\)\(B=\) .
进入组卷