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Question Number 122093 by SOMEDAVONG last updated on 14/Nov/20

$$\mathrm{I}.\mathrm{Study}\mathrm{coutinuity}\mathrm{of}\mathrm{function}:$$ $$1/.\mathrm{f}(\mathrm{x},\mathrm{y})=\{\begin{array}{l}\sqrt{1-{\mathrm{x}}^2-{\mathrm{y}}^2},\mathrm{if}{\mathrm{x}}^2+{\mathrm{y}}^2⩽1\\ 0,\mathrm{if}{\mathrm{x}}^2+{\mathrm{y}}^2>1\end{array}$$ $$\left(\mathbf{Helpe}\mathbf{me}\mathbf{please}\right)$$

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