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Find the critical point of the function f(x,y)=x2+y2+xy+12x c=________ Use the Second Derivative Test to determine...

Find the critical point of the function f(x,y)=x2+y2+xy+12x

c=________

Use the Second Derivative Test to determine whether the point is
A. a local maximum
B. a local minimum
C. a saddle point
D. test fails

Math   Calculus   
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