## Question

###### Sketch the graph of f2+2-4f(x,y) = 9 -x2 _ y2And find the domain.Define the continuity Of a function for tWo variables What 1S the key difference between limit and 2+2-4 continuity-Show that the limit does not exist by considering the limits as (x, y)-(0, 0) along the coordinate es_x +y (xyimoo Zxr+y7

Sketch the graph of f 2+2-4 f(x,y) = 9 -x2 _ y2 And find the domain. Define the continuity Of a function for tWo variables What 1S the key difference between limit and 2+2-4 continuity- Show that the limit does not exist by considering the limits as (x, y)-(0, 0) along the coordinate es_ x +y (xyimoo Zxr+y7

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