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【已解决】数学推导，Adaboost中zt归一化常数是怎么求出来的

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【已解决】数学推导，Adaboost中zt归一化常数是怎么求出来的

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就这个最后一步
我把右边的带入进去也求不出来，需要用到什么公式吗

我太蠢了数学小学水平


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