Question

@mathstudent55

Answer 1

Before you had fg(x) which means the product of function f(x) and g(x).
Here the little open circle between g and f means the composition of the functions, not the product of the functions.

Answer 2

To do the composition of functions, write out the first function as it is.
Then everywhere you see x, substitute x with the other function.

Answer 3

wait im so confused

Answer 4

Is this confusing to you?
"To do the composition of functions, write out the first function as it is."

Answer 5

so f(x)=5 square root x