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Given f(x,y) = x2−3y2−8x+9y+3xy  for each and any point that is critical, use the second-partial-derivative test to...

  1. Given f(x,y) = x2−3y2−8x+9y+3xy  for each and any point that is critical, use the second-partial-derivative test to determine whether the point is a relative maximum, relative minimum, or a saddle point.

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