題組內容
1. 設 f (x,y)=xy, x(t)=cost , y(t)=sint, g(t)=f(x(t),y(t)), t∈(-∞,∞ )
(i) (the gradient vector field of f )
?畫幾條 f 的等高線與一些在其上之
.
1. 設 f (x,y)=xy, x(t)=cost , y(t)=sint, g(t)=f(x(t),y(t)), t∈(-∞,∞ )
(i) (the gradient vector field of f )
?畫幾條 f 的等高線與一些在其上之
.