如果�有一个�芦原本可以饮用x次,每次饮用�芦有概率p不消耗次数,�芦可以饮用次数的期望是多�? 知乎 Template




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anonymous
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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. : )


anonymous
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anonymous
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tomski如果�有一个�芦原本可以饮用x次,每次饮用�芦有概率p不消耗次数,�芦可以饮用次数的期望是多�? 知乎 coloring