試卷名稱:103年 - 103 國立中正大學轉學生招生考試試題_部分系所:微積分#122825
年份:103年
科目:研究所、轉學考(插大)-微積分
4. Let f(x, y) = 4 + x³ + y³ - 3xy. Which of the following must be true?
(A) f has a local maximum at (0,0).
(B) f has a local minimum at (1,1).
(C) At the point P(1,0), f have the maximum rate of change in the direction
(1,-1).
(D) The maximum rate of change at the point P(1,0) is
.