Question 211414
Radicands must be greater than or equal to zero.


In f(x), the domain requires that 
{{{2x +4 >=0}}} 
{{{2x>=-4}}}
{{{x>=-2}}}


In g(x), the domain is 
{{{9x-16>=0}}}
{{{9x>=16}}}
{{{x>=16/9}}}


Please see my "non-traditional" explanation of "Functions, Domain, and Range"!! Go to my website by clicking on my tutor name "Rapaljer" anywhere in algebra.com.  Then look for my "MATH IN LIVING COLOR" page near the top of my Homepage.  Select "College Algebra", and look in Chapter 2 for this topic.  My students used to tell me they understood my explanations a LOT better than the explanations in the traditional textbooks.


R^2


Dr. Robert J. Rapalje, Retired
Seminole Community College
Altamonte Springs Campus
Florida