为什么把inf改成具体的数,比如200,它就不报错了
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直接给你看一下函数文档: Sum of series - MATLAB symsum- MathWorks 中国 This MATLAB function returns the sum of the series f with respect to the summation index k from the lower bound a to the upper bound b. https://ww2.mathworks.cn/help/symbolic/symsum.html?s_tid=doc_ta
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