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20 14 Zhanjiang senior high school entrance examination mathematics examination questions
The first question can be solved by yourself, and the answer is y=4-x2.

The second question: there was a picture, but the format was too big. The answer is that the area of △APC is larger than that of △AOC.

The third question: it's a bit complicated. We can imitate the process of the second question and the answer is existence.