(thing) by Footprints Wed Dec 13 2000 at 17:44:01
A function f(x) is said to be even (an even function) if f(x) = f(-x) for all x in D , where D is the domain of the function.

Examples of even functions: f(x) = cos x, f(x) = 2, f(x) = x2.

See also odd function.

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