作者kilalin (小小魔术师~~)
看板Electronics
标题[问题] 电磁学问题~
时间Sun Apr 15 22:47:23 2007
1.Prove the equality ▽‧(fA) = f▽‧A + A‧▽f in Cartesian coordinate ,
where A is a vector function and f is a scalar function.
︿ ︿
2.Assume the vector function A = 3x^2y^2ax-x^3y^2ay
(a) Find ∫(▽×A)‧ds over the triangular area.
(b) can A be expressed as the gradient of a scalar? Explain
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2 │ ╱▕
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1 │ ╴╴▕
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1 2 基本上是一个直角三角形，没有天分><
希望会的大大帮忙解~~><
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1F：→ laluku0227:问同学比较快 这些书上应该就有了 04/17 17:20