Several times during the video he says "f of g" when he should say "f times g".
In this lesson on composition of functions, we learn how to combine two functions by multiplying them and then evaluate the result. There are two ways to approach the problem: multiply the functions first and then evaluate, or evaluate first and then multiply. Both methods lead to the same answer, and it's up to the individual to choose which method they prefer.
The composition of two functions and then evaluate
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