Contact us
Choose a category below so we can get back to you as quickly as possible.
2≦x&菷178;-2 xから:x&菷178;-2 x+1≧3、解得:x≧1+根3、またはx≦1-根3 x&菗178;-2 x<8得:(x-4)(x+2) 2≦x&钾178;-2 x<8 3≦(x-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.