Hello! This is my first post in this forum, I spend mamy time in this exercise, but I can't iron out. Maybe someone help me? It's very important for me, because in september I need pass the exam.

$\displaystyle x^{,}_{1}=(a+1)x_{1}-ax_{2}\\x^{,}_{2}=(3a-1)x_{2}+ax_{1}$

$\displaystyle x_{1}(0)=1,x_{2}(0)=a$

Find:

$\displaystyle \frac{\partial x}{\partial a}\ for\ a=0\ where\ x=(x_{1},x_{2})$