You can download the answer key to the BIG problem given out on Friday.
Please note that there were two typos in that problem and I have fixed them in the answer key (so your answers may vary from mine - want to try parts of the problem again without the typos for extra practice?). The first typo was a problem for most of the questions since it is in the function definition. The part of the function used for negative values of x should have simplified to -x^2. The other typo was in question one and should say even instead of odd.
I apologize for the graphs being so small. The only way to make piecewise functions is on my calculator - a very small screen.
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