How to Compose Two Functions and then Determine the Domain, Rational and Radical

The video tutorial explains function composition, focusing on how to write and understand F of G of X. It defines G of X and demonstrates inputting values into functions, using examples like sqrt(2 - X). The tutorial simplifies expressions and discusses inverse operations. It concludes by determining the domain of a function, emphasizing that the denominator cannot be zero, and explains how to express the domain using intervals and unions.

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