[tex]\displaystyle\bf\\1) \ \ y= lnx +2x\\\\y'=(lnx)'+2\cdot x'=\frac{1}{x} +2\\\\\\2) \ \ (\sqrt{x} )'=\Big(x^{\frac{1}{2} } \Big)'=\frac{1}{2} \cdot\Big(x^{-\frac{1}{2} }\Big)=\frac{1}{2} \cdot\frac{1}{\sqrt{x} } =\frac{1}{2\sqrt{x} }[/tex]
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[tex]\displaystyle\bf\\1) \ \ y= lnx +2x\\\\y'=(lnx)'+2\cdot x'=\frac{1}{x} +2\\\\\\2) \ \ (\sqrt{x} )'=\Big(x^{\frac{1}{2} } \Big)'=\frac{1}{2} \cdot\Big(x^{-\frac{1}{2} }\Big)=\frac{1}{2} \cdot\frac{1}{\sqrt{x} } =\frac{1}{2\sqrt{x} }[/tex]