var('x,y,z')
A=matrix([[1,-4,-1],[1,1,0],[2,1,3]])
C=matrix([[1],[0],[0]])
r=A.det()
C=matrix([[1,-4,-1],[1,1,0],[1,0,0]])
q=C.det()
x=q/r
x
B=matrix([[1,-4,-1],[1,0,0],[2,1,3]])
t=B.det()
y=t/r
y
F=matrix([[1,0,0],[1,1,0],[2,1,3]])
e=F.det()
z=e/r
z

Strang-4.4-7-U (last edited 2010-12-18 11:07:05 by manishadeepthi)