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悠闲数学娱乐论坛(第3版)
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Post time 2016-4-2 16:53
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Post time 2016-4-5 13:51
本帖最后由 游客 于 2016-4-5 14:21 编辑
讨论a>0和a<0，用函数f(x)= x│x│ 的图象。
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悠闲数学娱乐论坛(第3版)
2025-3-6 22:01 GMT+8
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Post time 2016-4-5 13:51
