> | with(plots):with(DEtools): |
Warning, the name changecoords has been redefined
> | de:=16*diff(y(t),t$2)-8*diff(y(t),t)+145*y(t)=0; |
> | sol:=dsolve({de,y(0)=-2,D(y)(0)=1}); |
> | sol:=solve(sol,y(t)); |
> | plot(sol,t=0..10); |
> |
> | de:=diff(y(t),t$2)-diff(y(t),t)+1/4*y(t)=0; |
> | sol:=dsolve({de,y(0)=2,D(y)(0)=1/3}); |
> | sol:=solve(sol,y(t)); |
> | plot(sol,t=0..3.5); |
> | sol2:=solve(dsolve({de,y(0)=2,D(y)(0)=2}),y(t)); |
> | plot({sol,sol2},t=0..3,y=0..6); |
> | sol3:=solve(dsolve({de,y(0)=2,D(y)(0)=0.65}),y(t)): |
> | plot({sol,sol2,sol3},t=0..3,y=0..6); |