请问如何根据二阶导判断函数凹凸性 知乎 Template




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anonymous
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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


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sketch #1114 fire flame camping bonfire


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sketch #5330 Frozen by Amanda Kachadurian


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sketch #2992 Dragon by Iky Sahendra Putra


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sketch #5437 Mikasa from Attack on Titan by Manimarmuthu Muthu


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sketch #5160 Marilyn Monroe by Muhammet Karadoğan

tomski请问如何根据二阶导判断函数凹凸性 知乎 coloring