(-4<=X<0)U(0<X<=4/3)
把绝对值去掉则原式变为:1-(4/x)≥2或1-(4/x)≤-2由1-(4/x)≥2解得0<x≤4由1-(4/x)≤-2解得0<x≤4/3故原式解为:0<x≤4/3
|1-(4/x)|>=2所以1-(4/x)>=2或者1-(4/x)<=-2所以 -4<=X<0或X<=4