ϳ , . :
1. . , , , .
2. . - .
2. (6.8) (6.12)
(. 6.2):
x 1 x 2 ³ 1.
(4/3, 4/3) . 䳿:
1) £:
- x 1 + x 2 £ -1;
2) :
- x 1 + x 2 + s 4 = -1;
3) , , ( -):
x 1 = 2/3 s 1 1/3 s 2 + 4/3; x 2 = - 1/3 s 1 + 2/3 s 2 + 4/3 ;
4) :
- s 1 + s 2 + s 4 = -1;
5) - (. 6.7).
6.7
x 1 | x 2 | s 1 ¯ | s 2 | s 3 | s 4 | ||
Z | -1/3 | -1/3 | 0 | 8/3 | |||
x 1 | -2/3 | 1/3 | 4/3 | ||||
x 2 | 1/3 | -2/3 | 4/3 | ||||
s 3 | 1/3 | 1/3 | 0 | 22/3 | |||
s 4 | -1 | 1 | -1 | ||||
z | -2/3 | -1/3 | |||||
x 1 | -1/3 | -2/3 | |||||
x 2 | -1/3 | 1/3 | |||||
s 3 | 2/3 | 1/3 | |||||
s 1 | -1 | -1 |
, , D (2, 1).
. 6.2
3. (6.8) (6.12) :
x 1 ³ 12.
(4/3, 4/3) . , - 䳿:
1) £:
- x 1 £ -12;
2) :
- x 1 + s 5 = -12;
3) , , ( -):
x 1 = 2/3 s 1 - 1/3 s 2 + 4/3;
4) :
- 2/3 s 1 + 1/3 s 2 + s 5 = - 32/3.
- (. 6.8).
6.8
x 1 | x 2 | s 1¯ | s 2 | s 3 | s 5 | ||
z | -1/3 | -1/3 | 0 | 8/3 | |||
x 1 | -2/3 | 1/3 | 0 | 4/3 | |||
x 2 | 1/3 | -2/3 | 0 | 4/3 | |||
s 3 | 1/3 | 1/3 | 0 | 22/3 | |||
s 5 | -2/3 | 1/3 | 1 | -32/3 |
- (. 6.9).
|
|
6.9
x 1 | x 2 | s 1 | s 2 | s 3 | s 5 | ||
z | -1 | -1 | |||||
x 1 | 3/2 | ||||||
s 2 | -2 | -1 | |||||
s 3 | 1 | -2 | |||||
s 1 | -1 | -2 |
S 3 x 2 + s 3 + s 5 = -2. 䒺, 䒺 (s 3 = -2), . , .
4. (6.8) (6.12) :
3 x 1 + 2 x 2 £ 6.
(4/3,4/3) . 䳿:
1) :
3 x 1 + 2 x 2 + s 5 = 6;
2) , , ( -):
x 1 = 2/3 s 1 - 1/3 s 2 + 4/3; x 2 = - 1/3 s 1 + 2/3 s 2 + 4/3.
3) :
4/3 s 1 + 1/3 s 2 + s 5 = - 2/3.
-, , , 䒺. , .
- (. 6.10).
6.10
x 1 | x 2 | s 1 | s 2 | s 3 | ||
z | -3/5 | -4/5 | ||||
x 1 | 1/5 | -2/5 | ||||
x 2 | -2/5 | -1/5 | ||||
s 3 | 2/5 | 11/5 |
1) -x1 + 2x2 ³ 8; | 2) x1 x2 ³ 1. |
3) x1 + x2 ³ 6; | 4) 4x1 x2 £ -4. |
5) 3x1 + 2x2 £ 6; | 6) 4x1 3x2 ³ 3; |
7) x1³ x2; | 8) x1 + 3x2 £ 3; |
9) 3x1 x2 ³ 9; | 10) 5x1 + 4 x2 ³ 20; |
11) x2 ³ 5; | 12) 4x1 + x2 £ 2; |
13) x1 + 3x2 ³ 12; | 14) x1 ³ 4; |
15) -6x1 + x2 ³ 6; | 16) x1 ³ 3. |