- , , .
- :
:
cj, dj, bi, aij djxj ≠0.
, . .
1. .
2. k .
3. max(min) .
- , , , .
- .
6. . . , , , . 28.1
I III 26 39 , II 4 .
, , .
. x 1 , , x 2 . (2 1 + 3 x 2) . .,
:
Δ
x 2: L = (2 x 1 + 3 x 2) / (x 1 + x 2), 2 x 1 + 3 2 = Lx 1 + Lx 2, x 2 (3 - L) = x 1(L - 2),
k = (L - 2)/(3 l),
dk/dL > 0, k = (L - 2)/(3 - L) . . , (.) ( ).
. , (3, 1),
= (3, 1), L =9/4.
, 3 1 . 2,25 . .
- .
:
, f (x 1, 2 ,..., x) gi(x 1, x 2,..., x) .
|
|
, .
λ i .
. , ,
:
,
, , L . , , . . , , .
8.
:
. :
. : q1=x1-x2-2 q2=x2+2x3-4. , , .
x 1, x 2, x 3, λ1, λ2. ,
λ1 = - x 2, λ2 = - x 2/2,
1 = -2, x 2 = -4, x 3 = 4, L = -8.
, .
.
1 > -2, x 1 = -1, 2 = -3, x 3 = 7/2, L = -15/2.
1 < -2, 1 = -3, 2 = -5, x 3 = 9/2, L = -15/2.
, L = -8 .
. 1 = -2, x 2 = -4, x 3 = 4, L = -8.
9. : .
x 1 12 ., x 2 22 .
, , , 5 000 .
. .
:
.
F x 1, x 2 λ, , , , : λ = -5 000, x 1 = 2 500, x 2 = 2 500, L = 12 500 000 .
1 2500, L , L 1 = x 2 = 2 500 .
2 500 , 12 500 000 .
.
|
|
, .
1.. L =x 1 + 2 x 2 : | 2. L = x 1 + 3 x 2 : |
3. L = (x 1 - 6)2 + (x 2 - 2)2 : | 4. L = (x 1 3)2 + (x 2 4)2 : |
5. L = (x 1 - 4)2 + (x 2 - 3)2 : | 6. L = (x 1 - 3)2 + (x 2 2)2 : |
7. L = (x 1 2)2 + (x 2 l)2 : | L = x 12 + x 22 : |
,
12. L = 2 1 3 2 3 : | 13. L = 1 2 + x 2 x 3, : |
L =x 1 x 2 + 2 3 : | 15. L = 2 x 1 x 2 + 3 : |
16. : . 1 4 x 1 + 12 ., x 2 22 .
, , 200 .
***
- .
9. L = (2 x 1 - x 2) / (x 1 + x 2) : | 10. L = (3 x 1 - x 2)/(x 1 + x 2) : |
11. L = (3 x 1 + 7 x 2 )/(x l + 2 ) : |