用Maple求偏导数

f:=(x,y)->x^2*sin(2*y);

fx:=diff(f(x,y),x);

fy:=diff(f(x,y),y);

 或

f:=(x,y)->x^2*sin(2*y);

fx:=D[1](f)(x,y);

fy:=D[2](f)(x,y);

 

 

 

f:=(x,y)->x^2+3*x*y+y^2;

fx:=D[1](f)(1,2);

fy:=D[2](f)(1,2);

返回《用Maple做微积分》目录：http://xuxzmail.blog.163.com/blog/static/25131916201162994821693/