y=-2+1当x取何值时函数值y>0

y=-2+1当x取何值时函数值y>0
y=-2+1当x取何值时函数值y>0

y=-2+1当x取何值时函数值y>0
y=-2x+1
y＞0
-2x+1＞0
-2x＞-1
x＜1/2
当x小于2分之1时,y大于0

你好

y=-2x+1
根据题意y>0
-2x+1>0
1>2x
2x<1
x<1/2