设全集A={ x | log2(x+1)<2 )},B= {x| (1/2)2x-3>(1/2)x+2 }.求CRA.求...
问题描述:
设全集A={ x | log2(x+1)<2 )},B= {x| (1/2)2x-3>(1/2)x+2 }.求CRA.求...
设全集A={ x | log2(x+1)<2 )},B= {x| (1/2)2x-3>(1/2)x+2 }.求CRA.求若集合C ={x| x-a<0 },且C真子集B,求实数a的取值范围.)
答
1:
A={ x | log2(x+1)<2 )},
y=log2x为单调函数
0