:
1) () ,
2) , ( ),
3) (),
4) ().
, , , .
. .
1. .
:
(1)
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, , .
1.
, , .
, :
1) ,
2) ,
3) - , .
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-:
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m n
( ), , , .. rang A = rang = r. rang A = rang = r r = n, ; r < n, , n-r .
1.
:
A =
~ .
RgA = 2.
A* = RgA* = 3.
.
2. .
= ; = 2 + 12 = 14 ¹ 0; RgA = 2;
A* =
RgA* = 2.
. : x1 = 1; x2 =1/2.