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Question Number 90299 by zainal tanjung last updated on 22/Apr/20

help me    z(x,y)=xy.ln xy  z_x ^′ =...?   and  z′_y =...?

$$\mathrm{help}\:\mathrm{me} \\ $$$$ \\ $$$$\mathrm{z}\left(\mathrm{x},\mathrm{y}\right)=\mathrm{xy}.\mathrm{ln}\:\mathrm{xy} \\ $$$$\mathrm{z}_{\mathrm{x}} ^{'} =...?\:\:\:\mathrm{and}\:\:\mathrm{z}'_{\mathrm{y}} =...? \\ $$

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