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制作视频的初衷是想给对微积分感兴趣但没有信心去了解的朋友做些浅显易懂的解释。本人才疏学浅，内容难免有各种错误，欢迎大家批评指正。如果觉得哪里讲的不清楚的也请指出来，我会尽量修改。谢谢！

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【初中生能看懂的微积分】中阶篇：1.什么是函数

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