: .
, ( ) , . . , .. , , . , : , , , .
, :
- ;
- ( );
- , .
:
F(x) = c1x1 + c2x2 +... + cnxn à opt - ;
∑aijxj <= bi, i=1,...m; - ;
xj => 0 - .
, ().
-. , - , . , , . , .
. : , . 10 .. 1 , 2 1 . 10 .. 1 , 1 2 . 5 , 9 7 . 10 .. , .. (1, 2).
.
11
1 | 2 | ||
S1 (), | |||
S2 (), | |||
S3 (), | |||
( ), |
|
|
1. .
2.
x1 ;
x2 .
3.
31+42→max,
3 10 .. , ..;
4 10 .. , ..;
4. :
4.1. : 1x1 + 1x2 £ 5.
4.2. : 2x1 + 1x2 £ 9.
4.3. : 1x1 + 2x2 £ 7.
4.4. : x1 ³ 0, x2 ³ 0.
, :
1 + 2 ≤ 5,
21 + 2 ≤ 9,
1 + 22 ≤ 7,
1, 2 ≥ 0.
31 + 42→max.
, :
1) 1+2 = 5,
2) 21+2 = 9,
3) 1+22 = 7,
4) 1 = 0,
5) 2 = 0.
:
1) (0; 5); (5; 0);
2) (0; 9); (4,5; 0);
3) (0; 3,5); (7; 0).
, . , 0ABCD (. 16).
. 16
, , () , ( ), .. 1, 2 31+42 = .
, 0D.
.
31+42=12, (0, 3); (4, 0).
. , , . .
. 17
, , , , , :
1 + 2 = 5,
1 + 22 = 7,
1 = 3, 2 = 2.
, 30 .. 20 .. . = 31+42 = 17 ..
. , (, ) , , , . . , , .
|
|
1. ?
, . .3, S1 S3, .. . S2 , ( ).
. 18
S1.
S1 , Δ. (.) S2 S3 S1 . (.) , , .
(.) (11/3; 5/3).
S1 1+2 = 11/3 + 5/3 = 16/3.
S1 = 5, ..
ΔS1= 16/3 5 = 1/3.
(ΔS1) = 31 + 42 = 3*11/3+4*5/3 = 53/3.
Δ(ΔS1) = 53/3 17 = 2/3.
S3.
S3 . (.) . (.) .
(.) (0; 5).
S3 1+22 = 0 + 2*5 = 10.
S3 = 7, ..
ΔS3= 10 7 = 3.
(ΔS3) = 31 + 42 = 3*0+4*5 = 20.
Δ(ΔS3) = 20 17 = 3.
2. ?
, . S2. , (.) ( S2 ).
S2 21+ 2 = 2*3 + 2 = 8.
S3 = 9, ..
ΔS3= 9 8 = 1.
3. ?
. , , :
R = Δ(ΔSi) / ΔSi. (22)
, .
R1 = Δ(ΔS1) / ΔS1 = (2/3) / (1/3) = 2
R2 = Δ(ΔS2) / ΔS2 = Ø
R3 = Δ(ΔS3) / ΔS3 = 3 / 3 = 1
, S1 .