m n
;
(1, 2, , n), , , . , (1, 2, , n). , .
, , , .
, 1 , , .
; 1 =
: , 1.
, , D (A) = D (A1).= r. r .
, . . , , , r<. - . . r . r . r .
r , . , , , . (, ).
, . , .
. :
: A1
=
r ~r ~
r ~r
D (A)= = 1´5 - 0´(-2) = 5¹0, 2.
A1=
r ~r ~
r
D (A1)= = (-1)´1´4 + (-3)´0´2 + 2´0´0 - 2´1´0 - (-3)´2´4 -0´0´2=20¹0, A1 3.
, , .
. .
:
1 3, . 3-
D3 = = -10 + (-2) + 3 (-12) 1 - (-5) = 27 ¹ 0
, , . .
, , , ,
|
|
1 = , .
.
:
A1.
r ~r ~
r ~r ~r
D (A)= D (A1) = = -11 ¹ 0, , .
1 2 . 1 2, = -1 10 = -11 ¹ 0.
3 4.
.
1 2 3 4. :
;
3 = u, x4 = v, : , . u v , . , u v . , 3 = 11, x4 = -22 => 1 = , 2 = .