calculus help pleaseee

Question

1.  Let G(x)=1/x-11. Determine the composite function G◦G and its domain.

(G◦G)(x)=???

 

2.Let f(x)=x^2-4 and g(x)=x^4 Simplify or evaluate the function g(f(u)).

Answer 1

G(G(x)) =

 

G[1 / (x - 11)] =

 

1 / [(1 / (x - 11)) - 11]

 

 

Simplify.