Example 12.29.  Show that  [Graphics:Images/LaplaceConvolutionMod_gr_16.gif].  

Explore Solution 12.29.

Use convolution to find the inverse Laplace transform of  [Graphics:../Images/LaplaceConvolutionMod_gr_22.gif].  

The transform H[s] is the product of  [Graphics:../Images/LaplaceConvolutionMod_gr_23.gif], which are known to be the Laplace transforms of [Graphics:../Images/LaplaceConvolutionMod_gr_24.gif],  respectively.  Enter H[s].

[Graphics:../Images/LaplaceConvolutionMod_gr_25.gif]





[Graphics:../Images/LaplaceConvolutionMod_gr_26.gif]



Use the convolution formula to construct [Graphics:../Images/LaplaceConvolutionMod_gr_27.gif].

[Graphics:../Images/LaplaceConvolutionMod_gr_28.gif]




[Graphics:../Images/LaplaceConvolutionMod_gr_29.gif]

 

 

 

 

Aside. We can use the other convolution formula to construct [Graphics:../Images/LaplaceConvolutionMod_gr_30.gif].

[Graphics:../Images/LaplaceConvolutionMod_gr_31.gif]




[Graphics:../Images/LaplaceConvolutionMod_gr_32.gif]

 

 

 

 

Aside. We can check this with Mathematica's  result using the LaplaceTransform package.

[Graphics:../Images/LaplaceConvolutionMod_gr_33.gif]





[Graphics:../Images/LaplaceConvolutionMod_gr_34.gif]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(c) 2006 John H. Mathews, Russell W. Howell