[理工] 工數 PDE , vector
1.
ux - uy = 0
指定用分離變數法，算出
u(x,y)=c e^浪答(x+y)
可是題目沒給bc,ic
所以這就是答案嗎?
@@
2.
另一題，指定用散度定理做
積分 F (dot) n dA =?
F= xi+yi
S: z=2x+5y
0<=x<=2, -1<=y<=1
n: normal vector of S
del (dot) F =2
體積是2*2*(9+5)=61
所以答案是112嗎?
算出來都好不確定哦@@
感謝版上的大家!!
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