已知y1=2x-1,y2=x/2+1(1)当x取何值时,y1=y2?(2)当x取何值时,y1>y2?(3)当x取何值时,y1<y2?

问题描述:

已知y1=2x-1,y2=x/2+1
(1)当x取何值时,y1=y2?
(2)当x取何值时,y1>y2?
(3)当x取何值时,y1<y2?

解方程2x-1=x/2+1得x=4/3
所以(1)x=4/3
(2)x>4/3
(3)x

(1)2x-1=x/2+1
x=4/3
(2)2x-1>x/2+1
x>4/3
(3)2x-1<x/2+1
x<4/3