I have the following question:

Find the solution to the difference equation

$\displaystyle y(t) - \frac{1}{4}y(t-2) = 0$

Under initial conditions $\displaystyle y(-1) = 1$ and $\displaystyle y(-2) = 0$

I can't for the life of me remember how to do these, I've looked through my notes and got nothing. I understand how to do PDE's but I'm not sure what a difference equation is??

Any help would be great

p.s. Is there a way of solving this in MATLAB?