麻烦,解方程组,-(m-1)^2+4>=0-m^2+4>=0-(m-1)^2+4>-m^2+4_数学解答

-(m-1)^2+4>=0
(2+m-1)(2-m+1)>=0
(m+1)(3-m)>=0
(m+1)(m-3)<=0
-1<=m<=3
-m^2+4>=0
m^2<=4
-2<=m<=2
-(m-1)^2+4>-m^2+4
m^2-(m-1)^2>0
2m-1>0
m>1/2
所以,1/2