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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Questions answered by this video:
How do I find the value of the product of two functions at a given constant?
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The instructor shows an example of multiplying two functions and then finding the value of the product at x=6. He also demonstrates evaluating the functions at x=6 and then multiplying to find the product.