Contact us
Choose a category below so we can get back to you as quickly as possible.
A={x∣x=2k,k∈Z},則集合A為 所有偶數的集合, B={x∣x=2k+1 ,k∈Z},則集合B為 所有奇數的集合, A∩B=空集 A∪B={xx≠0 ,x∈Z}
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.