求下列函数的微分 (1) (2) (3)设y=y(x)满足方程xy-ex+ey=0,求dy
求下列函数的微分
(1)(2)
(3)设y=y(x)满足方程xy-ex+ey=0,求dy
求下列函数的微分
(1)(2)
(3)设y=y(x)满足方程xy-ex+ey=0,求dy
求下列函数的全微分.
(1)z=xmyn(2)z=x+y (3)z=arcsin(xy): (4)z=ex+ycosxsiny.
求下列方程所确定的隐函数z=z(x,y)的全微分: (1)yz=arctan(xz); (2)xyz=ez; (3)cos2x+cos2y+cos2z=1; (4)x+y+z=e-(x+y+z).
验证下列P(x,y)dx+Q(x,y)dy在整个xOy面内是某一函数u(x,y)的全微分,并求这样的一个u(x,y):
(2)(2x+ey)dx+(xey-2y)dy;
(3)2sin2xsin3ydx-3cos2xcos3ydy;
(4)(3x2y2+8xy3)dx+(2x3y+12x2y2+yey)dy.
计算题
(1)设求y';
(2)设y=(1+x2)arctanx,求y";
(3)求函数y=ln(x3·sinx)的微分dy.
高等数学复旦大学出版第三版下册课后习题答案习题十一
验证下列P(x, y)dx+Q(x, y)dy在整个xOy面内是某一函数u(x, y)的全微分,并求这样的一个函数u(x, y):
(1)(x+2y)dx+(2x+y)dy;
(2)2xydx+x2dy;
(3)(3x2y+8xy2)dx+(x3+8x2y+12yey)dy;
(4)(2xcosy+y2cosx)dx+(2ysinx-x2siny)dy.
求下列函数在给定点的全微分:
(1) z=x4+y4-4x2y2在点(0,0),(1,1);
(2)在点(1,0),(0,1).