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
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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