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.)
f (x, y) = x2 + xy + y2 + 8y
Here we first find the critical points of the given function and then we conclude it as minimum point and then find the minimum value of the function.