HW4 Prob 4a Formula Correction

From MurrayWiki

The formula in the book for problem 4a can be written another way. It can be replaced with:

y_k = C A^k x_0 + \sum_{i=0}^{k-1} C A^i B u_{k-1-i} + D u_k

--Julia Braman 08:19, 23 October 2007 (PDT)