Compare and contrast f(x)=x and f(x)=lxl in 2 way ??? ( think about domain and rany)?

Question

Compare and contrast f(x)=x and f(x)=lxl in 2 way ??? ( think about domain and rany)?

Answer 1

f(x)=x ... the domain and range are exactly the same

f(x)=IxI ... the range is always the postive of the domain:if x is -2, y is 2

hope this helped some... maybe you could graph the 2 equations on the same pair of axis and that will help you

Answer 2

The function f(x)=x is has a domain in all real numbers and a range of all real numbers.

The function f(x)=|x| has a domain of all real numbers and a range of greater then 0