speacial mathmatiques

1. Solve the di. system Y 0 = AY , if

A =

2

664

1 1 2

0 ????1 4

0 0 a

3

775

where a = 1 for

2. Find f analytic if

Re(f) =

x + a

(x + a)2 + y2 ; f(0) = i;

where

a = 1