[理工] [工數][Laplace]
t-1 ,1<t<2
︴
y''+4y'+3y=r(t) y(0)=2 y'(0)=-2 r(t)= ︴ 0, otherwise
2e^-t , 0<t<1
ans: y(t)= [ (1/2)e+2]e^-t-1/18{(e^3)(e^-3t)}+1/3-7/9 ,1<t<2
[(1/2)e+2]e^-t-[(1/9)e^6+(1/18)e^3]e^-3t ,t>2
這題我拉式算不出來
請各位高手幫個忙@@
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