Contact us
Choose a category below so we can get back to you as quickly as possible.
g'(x)=r+cosx x∈[-1,1],cosx∈[cos1,1],r+cosx∈[r+cos1,r+1] g'(x)在[-1,1]上為减函數,即g'(x)在[-1,1]上≤0恒成立,即r+cosx≤0恒成立 那麼只要使r+cosx取最大值時≤0即可 r+1小於等於0,r的最大值為-1
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.