(Chapter 1: Review) 1.18 The term “even function” may have come from the following fact: If fx()=xn, where nis an even integer, then fis an even function. These are the functions for: …,x±4,x±2,x0,x2,x4,…. The graph for the x2function on the previous pageis called a parabola. However, the graphs for x4, x6, etc. are
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