Contact us
Choose a category below so we can get back to you as quickly as possible.
證明: 令f(x)=lnx+1/x-1 f'(x)=1/x-1/x^2=(x-1)/x^2 當x>=1時,f'(x)>=0,f(x)是增函數,當x
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.