試卷名稱:102年 - 102 國立中正大學_學士班二年級轉學生招生考試試題:微積分#122826
年份:102年
科目:研究所、轉學考(插大)-微積分
4. Set f(x, y) = x2 + 2y2. Which of the following must be true?
(A) f(x, y) is concave upward on the line $y = -x
(B) the relative minimum of f(x, y) subject to the constraint x + y = 1 is
(C) the absolute minimum of f(x, y) on its domain does not exist
(D) the minimum rate of change of f(x, y) at the point P(1, -1) is 