$$$\frac{2 \sqrt{3} u}{3}$$$ 的導數
您的輸入
求$$$\frac{d}{du} \left(\frac{2 \sqrt{3} u}{3}\right)$$$。
解答
套用常數倍法則 $$$\frac{d}{du} \left(c f{\left(u \right)}\right) = c \frac{d}{du} \left(f{\left(u \right)}\right)$$$,使用 $$$c = \frac{2 \sqrt{3}}{3}$$$ 與 $$$f{\left(u \right)} = u$$$:
$${\color{red}\left(\frac{d}{du} \left(\frac{2 \sqrt{3} u}{3}\right)\right)} = {\color{red}\left(\frac{2 \sqrt{3}}{3} \frac{d}{du} \left(u\right)\right)}$$套用冪次法則 $$$\frac{d}{du} \left(u^{n}\right) = n u^{n - 1}$$$,取 $$$n = 1$$$,也就是 $$$\frac{d}{du} \left(u\right) = 1$$$:
$$\frac{2 \sqrt{3} {\color{red}\left(\frac{d}{du} \left(u\right)\right)}}{3} = \frac{2 \sqrt{3} {\color{red}\left(1\right)}}{3}$$因此,$$$\frac{d}{du} \left(\frac{2 \sqrt{3} u}{3}\right) = \frac{2 \sqrt{3}}{3}$$$。
答案
$$$\frac{d}{du} \left(\frac{2 \sqrt{3} u}{3}\right) = \frac{2 \sqrt{3}}{3}$$$A
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