Contact us
Choose a category below so we can get back to you as quickly as possible.
1/12 (a/3)*(b/4)=ab/12 又因為a,b互為倒數,則兩數乘積為1,即ab=1 所以原式=1/12
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.