Question #b1785

1 Answer
Dec 5, 2017

Domain x in R-{4}

Range y in {-1,1}

Explanation:

f(x)=abs(x-4)/(x-4)

x-4=0

x=4

when x<4

f(x)=abs(x-4)/(x-4)=(4-x)/(x-4)=-1

f(x)=-1

when x>4

f(x)=abs(x-4)/(x-4)=(x-4)/(x-4)=1

f(x)=1

then

Domain x in R-{4}

Range y in {-1,1}