posted by Vincent .
Evaluate the indicated function for f(x)=x2+1 and g(x)=x-4
Note: x2+1 means x squared plus one.
If (2f)(5) is supposed to mean 2 f(5), then the answer is 2 * (25 +1) = 52.
Why did you bother to define g(x) if it isn't used in the question?