Ex 14.1.1 Let f(x,y) = (x y). Determine the equations and shapes of the cross-sections when...

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Ex 14.1.1 Let f(x,y) = (x y). Determine the equations and shapes of the cross-sections when x = 0, y = 0, x = y, and describe the level curves. Use a three-dimensional graphing tool to graph the surface. (answer) Ex 14.1.1 Let f(x,y) = (x y). Determine the equations and shapes of the cross-sections when x = 0, y = 0, x = y, and describe the level curves. Use a three-dimensional graphing tool to graph the surface. (answer)