# 3. symmetry

A function is even if f(-x) = f(x), that is, if its graph is symmetric with respect to y-axis: A function is odd if f(-x) = -f(x), that is, if its graph shows rotational symmetry with respect to the origin: Exercise: study the symmetry of these functions: Solutions: a) f is an odd function; d) g is neither odd nor even function
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