Derivative of $$$\frac{\sqrt{2} x}{6}$$$
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Find $$$\frac{d}{dx} \left(\frac{\sqrt{2} x}{6}\right)$$$.
Solution
Apply the constant multiple rule $$$\frac{d}{dx} \left(c f{\left(x \right)}\right) = c \frac{d}{dx} \left(f{\left(x \right)}\right)$$$ with $$$c = \frac{\sqrt{2}}{6}$$$ and $$$f{\left(x \right)} = x$$$:
$${\color{red}\left(\frac{d}{dx} \left(\frac{\sqrt{2} x}{6}\right)\right)} = {\color{red}\left(\frac{\sqrt{2}}{6} \frac{d}{dx} \left(x\right)\right)}$$Apply the power rule $$$\frac{d}{dx} \left(x^{n}\right) = n x^{n - 1}$$$ with $$$n = 1$$$, in other words, $$$\frac{d}{dx} \left(x\right) = 1$$$:
$$\frac{\sqrt{2} {\color{red}\left(\frac{d}{dx} \left(x\right)\right)}}{6} = \frac{\sqrt{2} {\color{red}\left(1\right)}}{6}$$Thus, $$$\frac{d}{dx} \left(\frac{\sqrt{2} x}{6}\right) = \frac{\sqrt{2}}{6}$$$.
Answer
$$$\frac{d}{dx} \left(\frac{\sqrt{2} x}{6}\right) = \frac{\sqrt{2}}{6}$$$A