∵A={x|x/(x-2)>0},B={y|y=x^2+2x+4,x∈R},
∴A={x2},B={y≥3}
A●B=(-∞,0)∪(2,3]
设A、B是非空集合,定义A●B={x|x∈A∪B,且x不属于A∩B},已知A={x|x/(x-2)>0},B={y|y=x^2=2x+4,x∈R},则A●B=?
设A、B是非空集合,定义A●B={x|x∈A∪B,且x不属于A∩B},已知A={x|x/(x-2)>0},B={y|y=x^2=2x+4,x∈R},则A●B=?
求详细解释,有详细解释者可追加5分.
求详细解释,有详细解释者可追加5分.
数学人气:408 ℃时间:2019-08-24 06:41:06
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