已知二次函数y=-x+x-2,当自变量x取m时对应的值大于0,当自变量x分别取m-1,m+1时对如题 已知二次函数y=-x+x-2,当自变量x取m时对应的值大于0,当自变量x分别取m-1,m+1时对应的函数值为y1,y2,则y1,y2满足 A.y1>0,y2>0 B.y1,0,y2,0 C.y10 D.y1>0,y2
问题描述:
已知二次函数y=-x+x-2,当自变量x取m时对应的值大于0,当自变量x分别取m-1,m+1时对如题
已知二次函数y=-x+x-2,当自变量x取m时对应的值大于0,当自变量x分别取m-1,m+1时对应的函数值为y1,y2,则y1,y2满足 A.y1>0,y2>0 B.y1,0,y2,0 C.y10 D.y1>0,y2
答
Δ﹦‐7