Contact us
Choose a category below so we can get back to you as quickly as possible.
請先注意:a分之b應該寫成b/a,y=(sinx)^4+(cosx)²;=(sin²;x)²;+1-sin²;x令t=sin²;x,x∈[0,π/6],則t∈[0,1/4]y=t²;-t+1這個二次函數開口向上,對稱軸是t=1/2所以在[0,1/4]內單調遞減所以當t=…
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.