推 Tall781218:由stoke's theorem可知 原式=旋積一圈F'dr 05/12 09:48
推 Tall781218:=>S ydx+xdy-2xzdy-xydz z=0 x^2+y^2=a^2 逆時針一圈 05/12 09:52
推 Tall781218:Sd(xy)=0 冏 05/12 10:05
→ → → → → →
∫∫(▽XF)‧ndA=? F=yi+(x-2xz)j-xyk
s
s:x^2+y^2+z^2=a^2 , z>0
ans:1
這要怎麼求
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