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/