d^2y/dt^2=9(d^2y/dx^2)-e^(-x) for 0<x<4, t>0
y(0,t)=y(4,t)=0 for t>=0
y(x,0)=sin(pi*x), dy(x,0)/dt=0 for 0<=x<=4
更新1:
知足常樂,麻煩你了,謝謝!
知足常樂,麻煩你了,謝謝!
收錄日期: 2021-04-23 23:27:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150116000010KK05295