Question

What is y=f(g(x)) if f(x)=4x and g(x)=x+1?

Answer 1

f(g(x))=4(x+1)

Hope it helps

Answer 2

f(x)=4x

put x=x+1,

f(x+1)=4(x+1)

y=f(g(x))=4(x+1)