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1. (10pts) Find and sketch the domain of the function: f(x, y) = = x+y2 9x2+y2-9 (b) What is the range of the function?

1. (10pts) Find and sketch the domain of the function: f(x, y) = = x+y2 9x2+y2-9 (b) What is the range of the function?

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