Question

Find the following function for C

Answer 1

G(1) = 2*1 +1 = 3

f(g(1)) = f(3) = 3 +2 = 5

(f∘g)(1) = 5

Answer 2

Solve for G(x) first: 
g(x) = 2x+1 = 2(1) +1 = 2+1 = 3
now replace x with 3 in f(x)

f(x) = x+2 = 3+2 = 5
 Answer is 5