Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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Composition of Functions - Problem 3

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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Composition of functions is where one entire function is used as the input for the other function. Fog(x) is where the entire g expression should go into the f function where the x used to be, and vice-versa. One tip is to re-write the input as parentheses with a blank to start, and then go back and re-write the input function in the parentheses. Simplify. If your original problem has fog(x), then leave your result with the input x value- whereas if your original problem has fog(2), or some other input, then go back and put the 2 wherever the x's used to be.

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