Question: QUESTION 7 Compute the following limit, or show that it doesn't exist. Make sure to justify your answer in full. x-2xy + y lim

QUESTION 7 Compute the following limit, or show that it doesn't exist. Make sure to justify your answer in full. x-2xy + y lim (x,y)(0,0) x + y QUESTION 8 Compute the following limit, or show that it doesn't exist. Make sure to justify your answer in full. ysin(x) Let lim (x,y)+(0,0) 24+ y QUESTION 9 (a). Find the domain of f. f(x,y) = x+ (b). Determine whether the values 0, 1, and -1 are in the range of f. Justify your answer. (c). Find and sketch the level curves f(x, y) = and f(x, y) = 1. You may draw all of them in the same plane. (d). Compute the following limit, or show that it doesn't exist. Justify your answer. lim f(x, y) (x,y)(0,0) (e). (Optional; extra credit, 5 points.) Find the range of f. Justify your answer.

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