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zhangjob

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soliton923: Ó¦ÖúÖ¸Êý-1, ѧ¿Æ°æ ÇëÎð¹àË®~~~~ 2012-05-27 18:27:55
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2Â¥: Originally posted by math2000 at 2012-05-27 12:19:42
f+±íʾº¯ÊýfµÄÕý²¿£¬f-±íʾº¯ÊýfµÄ¸º²¿£¬±ÈÈçÈ¡f(x)=x,  -2<x<2
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