Example 8.   Use the Modified Euler Method to find numerical solutions to the D. E.  [Graphics:Images/HarvestingModelMod_gr_153.gif].  

Solution 8.

The solution curves with the initial conditions  [Graphics:../Images/HarvestingModelMod_gr_154.gif]  can all be computed over the interval  [Graphics:../Images/HarvestingModelMod_gr_155.gif].  
However the solution curves with the initial conditions   [Graphics:../Images/HarvestingModelMod_gr_156.gif]   must be computed over smaller intervals,
for instance the intervals   [Graphics:../Images/HarvestingModelMod_gr_157.gif].

[Graphics:../Images/HarvestingModelMod_gr_158.gif]


[Graphics:../Images/HarvestingModelMod_gr_159.gif]

[Graphics:../Images/HarvestingModelMod_gr_160.gif]

[Graphics:../Images/HarvestingModelMod_gr_161.gif]

[Graphics:../Images/HarvestingModelMod_gr_162.gif]

[Graphics:../Images/HarvestingModelMod_gr_163.gif]

[Graphics:../Images/HarvestingModelMod_gr_164.gif]

[Graphics:../Images/HarvestingModelMod_gr_165.gif]

Now all the solution curves can be shown on one graph.

[Graphics:../Images/HarvestingModelMod_gr_166.gif]


[Graphics:../Images/HarvestingModelMod_gr_167.gif]

This is the same as the graph that was obtained in Example 6.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(c) John H. Mathews 2004