Contact us
Choose a category below so we can get back to you as quickly as possible.
問的是各項係數之和,也就是與係數有關,與未知量x無關 所以可令:x=1 那麼各項係數之和就為(3*1-1/1)^n 所以(3*1-1/1)^n=128 n=7
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.