作者chat543 (小ㄐ)
看板trans_math
标题[积分]线面积
时间Fri Jun 27 21:00:44 2008
Let S be the positively directed curve of the elipse
x^2/9 + y^2/4 = 1
Evaluate the line integral ∫ (x^4-3y)dx+(4x+2y^2)dy
知道要用green 定理算
但还是不知道怎球= =?
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1F:推 LeoRen:旋度是7,7倍的椭圆面积为42pi118.160.181.143 06/27 22:22
2F:→ LeoRen:不论是green's也好stoke's也好,都一样!118.160.181.143 06/27 22:22
3F:→ LeoRen:想一下,这两个定理是可互通的!118.160.181.143 06/27 22:24