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## Main Question or Discussion Point

f(x) is an even function if f(-x) = f(x) for any x in the domain of f.

Now I say that f(x) = x^2 is defined on [-5,10]. Can I say f(x) is an even function?

Now I say that f(x) = x^2 is defined on [-5,10]. Can I say f(x) is an even function?