阿摩線上測驗
16. Find the relative extrema and saddle points of the function f(x,y)=
.
(A) Relative maximum at 
Saddle point at (0, 0, 0).
(B) Relative minimum at 
Saddle point at (0, 0, 0).
(C) Relative maximum at (0, 0, 0). Saddle point at 
(D) Relative minimum at (0, 0, 0). Saddle point at 
(E) None of these
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統計： A(0), B(1), C(0), D(1), E(0) #3139385
統計： A(0), B(1), C(0), D(1), E(0) #3139385
