Math Help - differential operator!

1. differential operator!

an equation of this form: $f(D)y=\exp^{ax}cosax$

pls how do one approach it? thanks.

2. Re: differential operator!

Originally Posted by lawochekel
an equation of this form: $f(D)y=\exp^{ax}cosax$

pls how do one approach it? thanks.
Approach what? You haven't actually asked a question!!

-Dan