Question

Find (fog)(4).
f(x) = x + 1
g(x) = x²

Answer 1

`(f\circ g)(x)=f(g(x))\\\\f(x)=x+1\\g(x)=x^2\\\\(f\circ g)(x)=x^2+1\\\\(f\circ g)(4)=4^2+1=17`