Question: 6 ( 1 0 p t s ) Find all the critical points of the function f ( x , y ) = x 3

6(10pts)
Find all the critical points of the function f(x,y)=x3+13y3-9x2-21x-y-66 and label them as either local maximum, local minimum, or saddle points.
6 ( 1 0 p t s ) Find all the critical points of

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