Solved: In Exercises 79 and 80, write an equation whose graph has the indicated
Chapter 0, Problem 81(choose chapter or problem)
(a) Prove that if a graph is symmetric with respect to the x-axis and to the y-axis, then it is symmetric with respect to the origin. Give an example to show that the converse is not true.
(b) Prove that if a graph is symmetric with respect to one axis and to the origin, then it is symmetric with respect to the other axis.
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