Using the concept composite function, we have that:
The function
is found replacing each occurrence of x in the equation f(x) with the output of function g(x) for the respective value of x.
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The composite function of f and g of x is given by:

That is, the input of the function f for a given value of x is the output of function g for this given value of x.
Thus, the sentence is completed as:
The function
is found replacing each occurrence of x in the equation f(x) with the output of function g(x) for the respective value of x.
A similar problem is given at brainly.com/question/23458455