y"+ 7y' + 12y = 21e^3t
Solve the IVP by Laplace transform.
Slove it by laplace transfrom
圖片參考:http://imgcld.yimg.com/8/n/AB05413308/o/1011112306...
希望有幫助到你喔 :)
IVP 的 initial value 在哪??
2011-11-24 14:07:19 補充:
初值多少??? 初值 = initial value,y(0) = ???
2011-11-24 14:23:41 補充:
需要兩個初值才能用拉氏轉換計算:y(0) = ?? y'(0) = ??