quiz_01B - f ( x,y ) is 9-x 2-9 y 2 > or 9...

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Math 213 — Quiz 1 Name Sample Solution 1. Find and sketch the domain of the function f ( x,y ) = ln(9 - x 2 - 9 y 2 ). Since ln is only defined for positive values, the domain of
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Unformatted text preview: f ( x,y ) is 9-x 2-9 y 2 > or 9 > x 2 + 9 y 2 . This is the interior of the ellipse x 2 / 3 2 + y 2 = 1....
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