Determine if the FoG is defined, if it is not find the resriction of Go so that FoG is defined.

- f and g have domain of 0 to infinity

f(x)= root x

g(x)=3-2x

please help urgent

Edit: well my main problem is that i dont know how to find out if the 2 compostie functions is defined or not, pls explain that part for me thanks