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During the last lecture, you talked about the last year final exam, there's a question which is about sketching graph. For the first part, what are we supposed to write for the symmetry? Do we have to talk about the symmetry of the domain, whether the function is even or odd, do we have to talk about the symmetry about the asymptotes? Thanks for your time!

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The students were supposed to check if the function is even or odd. You should know (because it helps solving the rest of the question) that even functions are symmetric with respect to the y-axis, odd functions are symmetric with respect to the origin.