去分母得m-1=2(x+1)
∴x=
1
2 (m-3),
∵x>0,
∴
2 (m-3)>0,解得m>3,
∵x+1≠0,即x≠-1,
2 (m-3)≠-1,解得m≠1,
∴m的取值范围是m>3.
故答案为m>3.