# Math Help - Differential Equations

1. ## Differential Equations

Ok so I know that this is problem realllly easy, but nevertheless..

the family of functions is y = ce^(-2x) + e^(-x)
the solution of the equation is y' + 2y = e^(-x)

I have to find the constant c which defines the solution which also satisfies the initial condition y(-3)=10

now i started out finding y' and then plug in the initial condition...

I'm getting stuck. Any help??

2. Originally Posted by ktina7447
Ok so I know that this is problem realllly easy, but nevertheless..

the family of functions is y = ce^(-2x) + e^(-x)
the solution of the equation is y' + 2y = e^(-x)

I have to find the constant c which defines the solution which also satisfies the initial condition y(-3)=10

now i started out finding y' and then plug in the initial condition...

I'm getting stuck. Any help??
how about showing us where you got so far? this should be straightforward, maybe you made a mistake somewhere that we can point out