Contact us
Choose a category below so we can get back to you as quickly as possible.
∵二次函數y=f(x)滿足f(3+x)=f(3-x),∴函數的圖像關於x=3對稱,∵f(x)=0有兩個實根x1、x2,且這兩個實根關於對稱軸對稱,∴x1+x2=2×3=6故選C.
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.