8 Which statement s on the function f x y z x xy xy z z is true I f has exactly one critical point namely a local minimum II f

Question

8 Which statement s on the function f x y z x xy xy z z is true I f has exactly one critical point namely a local minimum II f has exactly one critical point namely a local maximum III f has exactly one critical point namely a saddle point IV has multiple critical points a D I C IV 11 None d

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