[tex]Ad.a\\ \\ D=<-5,0>\cup <1,6>\\ \\ Ad.b\\ \\ Z_{w} =<-2,3>\\ \\ Ad.c\\ \\ f(x)=2~~dla ~~x=-1~~\wedge ~~x=2\\ \\ Ad.d\\ \\ f(x)\geq -1~~dla~~x\in <-5,0>\cup <1,5>[/tex]
