# 11

> MODEL := diff( y(t), t$2 ) + 4*diff(y(t), t ) + 5*y(t) = 0;

> VAR := { y(t) } ;

>

> IC := y(0)=1, D(y)(0)=0;

> dsolve( { MODEL, IC }, VAR );

> SOLNy := rhs( % );

> SOLNv := diff( SOLNy, t );

> plot( [ SOLNy, SOLNv ], t=0..3, color=[GREEN,BLUE],

> title = `y- and v- solution curves for # 11` );

>