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Question: Plot reduced system of differential equations

Question:Plot reduced system of differential equations

MrMarc 3163 Maple
plot
June 08 2008
0

I have two differrential equations:

 

1) x ' ( t ) = x( t ) + y( t )

which can be written as

x ( t ) - x (t -1) = x ( t) + y (t )

- x (t -1) = x ( t) + y (t ) - x ( t )

- x (t -1) =  y (t )           A

 

2) y ' ( t ) = 4 * x( t )  + y (t )

which can be written as

y( t ) - y (t -1) = 4 * x( t )  + y (t )

y( t ) = 4 * x( t )  + y (t ) +  y (t -1)        B

 

If we plug in A in B we get

y( t ) = 4 * x( t ) - x (t -1) +  y (t -1)       C

 

My question is how can I plot  equation C  by using the plot3d() function ?

 

 
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