申論題

14. Let E be a tetrahedron(四面體) in R³ bounded by the planes x + u + z = 3, 2 = 2z, y = 0 and 2 = 0. Let also F:=(x-y)i+(y²+ z²) k.

(b) If S₁is the boundary surface of E (including all faces) endowed with the outward orientation, one has curl Fㆍ dS = __(19)__