edwinawixip87g0t
edwinawixip87g0t
04-05-2018
Mathematics
contestada
differentiate y=x^√x
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LammettHash
LammettHash
04-05-2018
Rewrite the right hand side in terms of exponentials and logarithms, using the fact that
[tex]a=e^{\ln a}=\exp(\ln a)[/tex]
[tex]y=x^{\sqrt x}=\exp\left(\ln x^{\sqrt x}\right)=\exp\left(\sqrt x\ln x\right)[/tex]
Now differentiate both sides, applying the chain and product rules.
[tex]\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\mathrm d}{\mathrm dx}\exp\left(\sqrt x\ln x\right)[/tex]
[tex]\dfrac{\mathrm dy}{\mathrm dx}=\exp\left(\sqrt x\ln x\right)\cdot\dfrac{\mathrm d}{\mathrm dx}\left(\sqrt x\ln x\right)[/tex]
[tex]\dfrac{\mathrm dy}{\mathrm dx}=x^{\sqrt x}\left(\dfrac{\mathrm d}{\mathrm dx}[\sqrt x]\ln x+\sqrt x\dfrac{\mathrm d}{\mathrm dx}[\ln x]\right)[/tex]
[tex]\dfrac{\mathrm dy}{\mathrm dx}=x^{\sqrt x}\left(\dfrac{\ln x}{2\sqrt x}+\dfrac{\sqrt x}x\right)[/tex]
[tex]\dfrac{\mathrm dy}{\mathrm dx}=\dfrac12x^{\sqrt x}\left(x^{-1/2}\ln x+2x^{-1/2}\right)[/tex]
[tex]\dfrac{\mathrm dy}{\mathrm dx}=\dfrac12x^{\sqrt x-1/2}\left(\ln x+2\right)[/tex]
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