作者naruto1031 (毛毛)
看板NTU-Exam
标题[试题] 97下 薛克民 微积分甲下 第五次小考
时间Sun May 31 23:31:45 2009
课程名称︰微积分甲下
课程性质︰大一共同必修
课程教师︰薛克民
开课学院:生农学院,理学院
开课系所︰工管科管组,生机系,生工系,地质系
考试日期(年月日)︰98/5/4
考试时限(分钟):110
是否需发放奖励金:是
(如未明确表示,则不予发放)
试题 :
y^2
1.Find the maximum rate of change of f(x,y) = ── at the point (2,4) and
x
the direction in which it occurs (10%)
2.Find all point at which the direction of the fastest change of the function
f(x,y) = x^2+y^2-2x-4y is (1,1) (10%)
3.Find the extreme values of f(x,y) = (x^2+y^2) ^ (e^(y^2-x^2)) (10%)
4.Find the extreme values of f(x,y) = x^2+y^2 subject to xy = 1 (10%)
5.Find the extreme values of f(x,y) = 2x^2+3y^2-4x-5 on the region
x^2+y^2≦16 (10%)
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