n n :
.
.
, .
.
.
:
, .
: 1) , 2) .
1.
:
:
) .
. .
= =2(-1) =-2(-2-3)=10 .
, .
, , , ( ):
= =2(-1) -2(-1-4)=10.
. .
= =1(-1) =10+10=20.
.
= =-1(-1) =50-20=30.
:
x = = z =
) .
:
, .
, (-2) (-3) .
(-2) (-3)
, (-2) .
(-2) .
, . :
z=3, = 11-3z = 11-9 = 2.
= 1, = 2, z = 3.
5 .
5. c :
x1 22+x3=1
2x1+32 x3=8
x1 2+23= -1
. ; - 1, X2, X3; H - - :
1 -2 1 X1 1
= 2 3 -1, = 2, H= 8.
1 -1 2 X3 -1
: A× = (l)
( ), -1. (1) -1 :
|
|
( ), =,
(2)
(2) . -1.
11 12 13
= 21 22 23. -1 =
31 32 33
ij (i=1, 2, 3; j=l, 2, 3) ij , (-l)i+j () , i- j-o .
ij .
1 -2 1
= 2 3 -1 =10 0, , -1
1 -1 2
5 3 -1
-1= -5 1 3 =
-5 -1 7
(2) :
= ×
, = (3; 0; -2).
1. , , n- ?
2. .
3. , ?
4. . ?
5. .
6. ?
7. ?
8. ? , ?
9. ? ?
10. - .
11. .
12. ?