作者GHJK777 (GHJK777)
看板Math
标题[微积] 双变数 chain rule (300P)
时间Wed Jun 1 21:38:52 2011
Show that z = f(x + at) + g(x - at)
is a solution of the wave equation
2 2
δ z δz
-------- = a^2 * -------
δ t^2 δx^2
300p有奖徵答!!
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◆ From: 140.112.4.181
1F：推 ntust661 := = 06/01 21:43
2F：推 deepwoody :带进去就好了吧... 06/01 21:44
3F：→ deepwoody :也可以用傅立叶转换把PDE的解解出来... 06/01 21:44
4F：→ GHJK777 :我有带过 但是不知道在哪里有问题 06/01 22:04