In: Math
Find the local maximum and minimum values and saddle point(s) of the function. If you have three-dimensional graphing software, graph the function with a domain and viewpoint that reveal all the important aspects of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)
1) f(x, y) = 2x3 − 6x + 6xy2
2) f(x, y) = x3 + y3 − 3x2 − 6y2 − 9x