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Derivatan av $$$2 x^{2} - 2^{\frac{2}{3}} x + \sqrt[3]{2}$$$
Relaterade kalkylatorer: Kalkylator för logaritmisk derivering, Räknare för implicit derivering med steg
Din inmatning
Bestäm $$$\frac{d}{dx} \left(2 x^{2} - 2^{\frac{2}{3}} x + \sqrt[3]{2}\right)$$$.
Lösning
Derivatan av en summa/differens är summan/differensen av derivatorna:
$${\color{red}\left(\frac{d}{dx} \left(2 x^{2} - 2^{\frac{2}{3}} x + \sqrt[3]{2}\right)\right)} = {\color{red}\left(\frac{d}{dx} \left(2 x^{2}\right) - \frac{d}{dx} \left(2^{\frac{2}{3}} x\right) + \frac{d}{dx} \left(\sqrt[3]{2}\right)\right)}$$Tillämpa konstantfaktorregeln $$$\frac{d}{dx} \left(c f{\left(x \right)}\right) = c \frac{d}{dx} \left(f{\left(x \right)}\right)$$$ med $$$c = 2^{\frac{2}{3}}$$$ och $$$f{\left(x \right)} = x$$$:
$$- {\color{red}\left(\frac{d}{dx} \left(2^{\frac{2}{3}} x\right)\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) + \frac{d}{dx} \left(2 x^{2}\right) = - {\color{red}\left(2^{\frac{2}{3}} \frac{d}{dx} \left(x\right)\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) + \frac{d}{dx} \left(2 x^{2}\right)$$Tillämpa potensregeln $$$\frac{d}{dx} \left(x^{n}\right) = n x^{n - 1}$$$ med $$$n = 1$$$, det vill säga $$$\frac{d}{dx} \left(x\right) = 1$$$:
$$- 2^{\frac{2}{3}} {\color{red}\left(\frac{d}{dx} \left(x\right)\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) + \frac{d}{dx} \left(2 x^{2}\right) = - 2^{\frac{2}{3}} {\color{red}\left(1\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) + \frac{d}{dx} \left(2 x^{2}\right)$$Tillämpa konstantfaktorregeln $$$\frac{d}{dx} \left(c f{\left(x \right)}\right) = c \frac{d}{dx} \left(f{\left(x \right)}\right)$$$ med $$$c = 2$$$ och $$$f{\left(x \right)} = x^{2}$$$:
$${\color{red}\left(\frac{d}{dx} \left(2 x^{2}\right)\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) - 2^{\frac{2}{3}} = {\color{red}\left(2 \frac{d}{dx} \left(x^{2}\right)\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) - 2^{\frac{2}{3}}$$Tillämpa potensregeln $$$\frac{d}{dx} \left(x^{n}\right) = n x^{n - 1}$$$ med $$$n = 2$$$:
$$2 {\color{red}\left(\frac{d}{dx} \left(x^{2}\right)\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) - 2^{\frac{2}{3}} = 2 {\color{red}\left(2 x\right)} + \frac{d}{dx} \left(\sqrt[3]{2}\right) - 2^{\frac{2}{3}}$$Derivatan av en konstant är $$$0$$$:
$$4 x + {\color{red}\left(\frac{d}{dx} \left(\sqrt[3]{2}\right)\right)} - 2^{\frac{2}{3}} = 4 x + {\color{red}\left(0\right)} - 2^{\frac{2}{3}}$$Alltså, $$$\frac{d}{dx} \left(2 x^{2} - 2^{\frac{2}{3}} x + \sqrt[3]{2}\right) = 4 x - 2^{\frac{2}{3}}$$$.
Svar
$$$\frac{d}{dx} \left(2 x^{2} - 2^{\frac{2}{3}} x + \sqrt[3]{2}\right) = 4 x - 2^{\frac{2}{3}}$$$A