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|A||A|
0,
x1=
A1
,···,xn=
An
|A|
+a12A2
=
1
[a11(b1A11+b2A21+···+bnAn1)+a12(b1A12+b2A22+···+bnAn2)
+···+a1n(b1A1n+b2A2n+···+bnAnn)]=
b|A||A|1
=b1.
Ai
xi=