Question

Find the domain and range then sketch the graph (piece wise function).

1. f(x)= {-1, x<0
0, x =0
1, x >0

Answer 1

the function signumfunction
-1if x<0 mean for all x values <0 f(x)=-1
70if x=0
1ifx>0(positive real number)
what I conclude from this is
domain=R(f(x) is defined for all real number0
range=[-1,1]