推 jane050177:漢水友情大推!!! 詳解就有請華均兄了!!95魂!!! 05/11 00:27
CALCULUS(GENERAL MATHEMATICS)(A)(2) test 3rd 2007/5/21
I.Find the equation of the tangent plane to the surface
2xy^2 + 3x^2 - 2z^2 = 3 at the point(1,2,2).(30%)
II.Let D = {(x,y)|x^2 + y^2 <= 40} be a thin plate and the temperature at the point (x.y) on the D is T(x,y) = 3xy + 4y^2.
Find the highest and lowest temperatures. (40%)
III.Find the maximum value of f(x,y,z) = 2xy + yz
subject to the constraints x + 2y = 6, 2x - 3z = 0. (30%)
有人願意詳解一下嗎？
口口口我恨bbs 都什麼時代了=.=
※ 編輯: benimut 來自: 61.228.245.1 (05/10 10:30)