[理工] [工數]-積分定理問題4

[roud (對愛絕望)]

                                   2        3
Evaluate the surface integral ∫∫x ydzdx -x zdxdy - 2xdydz where S is the
surface of the tetrahedron by the point (1 1 1 ), (2 4 1 ), (5 1 1 ), (4 9 3)
as vertices.


ans:   -8


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