Contact us
Choose a category below so we can get back to you as quickly as possible.
若x>=1,則-(1-x)+2x+3+x-5=4x-3 若x
小算盘上的log就是lg(10為base) 如果想算ln,小算盘上應該也有(e為base)
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.