已知sinx=(2m-1)/(m+3),则m的取值范围

已知sinx=(2m-1)/(m+3),则m的取值范围
已知sinx=(2m-1)/(m+3),则m的取值范围

已知sinx=(2m-1)/(m+3),则m的取值范围
-1=0
m=-2/3
分母不等于0
m=-2/3
(2m-1)/(m+3)

由-1<=sinx<=1,则-1<=(2m-1)/(m+3),<=1
则-2/3<=m<=4

-1=即-1=<(2m-1)/(m+3)<=1
先看-1=<(2m-1)/(m+3)
-m-3=<2m-1
3m>=-2
m>-2/3
再看(2m-1)/(m+3)<=1
2m-1<=m+3
m<=2
则-2/3=