1. 5x-1>2x+5 3x>6 x>2x-4<3x+1 -5<2x x>-0.25∴x>22 2x-a<1 x<(1+a)/2 x-2b>3 x>3+2b(1+a)/2=1 a+1=2 3+2b=-1 b+1=-1(a+1)(b+1)=-23. x>-2, 2x+1≧5x-5 6≧3x x≦2 -2<x≦2 ,整数解-1 0 1 2
1. 5x-1>2x+5 3x>6 x>2x-4<3x+1 -5<2x x>-0.25∴x>22 2x-a<1 x<(1+a)/2 x-2b>3 x>3+2b(1+a)/2=1 a+1=2 3+2b=-1 b+1=-1(a+1)(b+1)=-23. x>-2, 2x+1≧5x-5 6≧3x x≦2 -2<x≦2 ,整数解-1 0 1 2