Contact us
Choose a category below so we can get back to you as quickly as possible.
因為集合S滿足如果x屬於s,則8-x屬於s,而S又是單元素集合 那麼必須有x=8-x 即2x=8,x=4 過程就那麼簡單.不懂再HI我!
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.