A radical function is a function that contains a radical with a variable in its radicand.
These functions are radical functions:
f(x)=


g(x)= 
Domain: The domain is all values that x can take on. The only problem you have with this function is that you cannot have a negative inside the square root. So you'll set the insides greaterthanorequalto zero, and solve.
Range: The range requires a graph.
Find the domain of f(x)=
The expression under the radical has to satisfy the condition
152xx
^{2} > 0 for the function to take real values.
152xx
^{2} > 0
(5+x)(3x)
> 0
Evaluating at several points:
Then the domain is [5,3]
Determine the domain of the given function:
To use interval notation: Write i to get the symbol
and write i to get the symbol