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$$$u$$$的导数
您的输入
求$$$\frac{d}{du} \left(u\right)$$$。
解答
应用幂法则 $$$\frac{d}{du} \left(u^{n}\right) = n u^{n - 1}$$$，取 $$$n = 1$$$，也就是说，$$$\frac{d}{du} \left(u\right) = 1$$$：
$${\color{red}\left(\frac{d}{du} \left(u\right)\right)} = {\color{red}\left(1\right)}$$因此，$$$\frac{d}{du} \left(u\right) = 1$$$。
答案
$$$\frac{d}{du} \left(u\right) = 1$$$A
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