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笔者在做2011年全国高中数学联赛吉林赛区预赛卷时,发现第3题没有正确选项,现整理出来,供读者参考.题目设函数y=f(x)(x∈R)满足f(x+2)
When I made the 2011 National Senior High School Mathematics League Jilin Division preliminaries, I found that the third question is not correct option, now sorted out for readers reference. Subject set function y = f (x) (x∈R) satisfy f (x + 2)