fog is the name of the function, fog(x) is the value of that function at the vector x.
Hi This post has helped me with my problem, but I am still confused on the part that says
if we explicity calculate f(g(x,y)), we get f(g(x,y)) = (y-2, -x).
so if (x,y) = (y-2,-x) we get 2 equations in x and y. can you solve these?
How do you find y-2, and -x, I just cant see how you got to these.
Please help I have nearly no hair left!!