搜索 - 科创

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定义幂级数：我们要求的是很明显有则递归则有很明显结算带入x=1，即问题到这里似乎就结束了，但是我们可以求出所有类似级数的值对于n的指数是正整数的情况，这类无穷级数都是收敛的，而且其结果都是解析的

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