Question

If a(x)=3x+1 and b(x)= x-4, what is the domain of ..

Answer 1

Step-by-step explanation:

For sqrt(x - 4) to be defined, x >= 4.

For a(x) >= 4, 3x + 1 >= 4, x >= 1.

Hence the domain of the composite function is the 3rd from the top.