作者mdpming (.....)
看板Grad-ProbAsk
标题[理工] [工数]-Laplace..
时间Tue Jan 26 22:10:50 2010
1.
3y(t) - 4y(t-1) + 2y(t-2) = t
using the Laplace transform if y(t) = 0 for t<0
解答这一步我不太懂
0 , t < 2
y(t-2) =
y(t-2) , t > 2
得
y(t-2) = u(t-2)y(t-2)
请问这面这要怎麽看出来..我不会看..
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1F：→ iyenn:分段点 01/26 22:20
2F：→ mdpming:...=.=... 01/26 22:45