Question

If f(x)=2x and g(x)=x^2+1 what is f(g(3))

Answer 1

20

Explanation:

first find the value for g(3) :

g(x) = x^2 + 1 ➡ g(3) = 3^2 + 1 ➡10

now write this inside the f(x) function

f(g(3) = f(10) = 2×10 = 20