Here are the essential concepts you must grasp in order to answer the question correctly.
Function Composition
Function composition involves combining two functions to create a new function. If you have two functions, f(x) and g(x), the composition g(f(x)) means you first apply f to x, and then apply g to the result of f. This process is essential for evaluating expressions where one function's output becomes the input for another.
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Piecewise Functions
A piecewise function is defined by different expressions based on the input value. In the given problem, g(x) is defined differently for two intervals: one for values from -2 to 0 and another for values from 0 to 2. Understanding how to evaluate piecewise functions is crucial for correctly applying them in function composition.
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Evaluating Functions
Evaluating a function involves substituting a specific value into the function's expression to find the output. For example, to evaluate f(0) in the function f(x) = 2 - x, you replace x with 0, resulting in f(0) = 2. This step is necessary before performing function composition, as it determines the input for the next function.
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