Examen Parcial
1.Demuestre algebraica mente que todas las soluciones básicas de la siguiente P.L sea no factibles
Maximizar Z = x1+3x2
Sujeto a :
x1+x2 < o = 2
-x1+x2 < o = 4
x1,x2 > 0
Variables no basicas
|
Variables basicas
|
Solucion basica
|
Punto de esquina solucion
|
Factible
|
Valor objetivo
|
(x1,x2)
|
(s1,s2)
|
(2,4)
|
A
|
Si
|
0
|
(x1,s1)
|
(s2,s2)
|
(2,2)
|
B
|
Si
|
6
|
(x1,s2)
|
(x2,s1)
|
(4,-2)
|
C
|
No
|
---
|
(x2,s1)
|
(x1,s2)
|
(2,0)
|
D
|
Si
|
2
|
(x2,s2)
|
(x1,s2)
|
(-4,6)
|
---
|
No
|
---
|
(s1,s2)
|
(x1,x2)
|
(-1,3)
|
---
|
No
|
---
|
2. Considere el Problema
Minimizar Z = 4x1-8x2+3x3
Sujeto a :
x1+x2+x3 = 7
2x1-5x2+x3 > o = 10
x1,x2,x3 > o = 0
3. Considere el Problema
Maximizar Z = 16x1+15x2
Sujeto a :
40x1+31x2 < o = 124
-x1+x2 < o = 1
x1 < o = 3
x1,x2 > o = 0
Z = 16x1
+ 15x2 + 0s1 + 0s2 + 0s3
-x1 + x2 + s2 = 1
x1 + s3 = 3
- Ahora obtendremos la fila de pivote:
Básica
|
Z
|
x1
|
x2
|
s1
|
s2
|
s3
|
Solución
|
Z
|
1
|
-16
|
-15
|
0
|
0
|
0
|
0
|
S1
|
0
|
40
|
31
|
1
|
0
|
0
|
124
|
S2
|
0
|
-1
|
1
|
0
|
1
|
0
|
1
|
S3
|
0
|
1
|
0
|
0
|
0
|
1
|
3
|
- Obtendremos la fila de pivote:
Básica
|
X1
|
Solución
|
Relación
|
s1
|
40
|
124
|
124/40 = 3.1
|
S2
|
-1
|
1
|
-----
|
S3
|
1
|
3
|
3/1 = 3
|
Básica
|
Z
|
x1
|
x2
|
s1
|
s2
|
s3
|
Solución
|
Z
|
1
|
0
|
-15
|
0
|
0
|
16
|
48
|
S1
|
0
|
0
|
31
|
1
|
0
|
-40
|
4
|
S2
|
0
|
0
|
1
|
0
|
1
|
1
|
4
|
x1
|
0
|
1
|
0
|
0
|
0
|
1
|
3
|
- Hallando fila que se reemplazara
Básica
|
x2
|
Solución
|
Relación
|
S1
|
31
|
4
|
4/31=0.12
|
S2
|
1
|
4
|
4/1= 4
|
X1
|
0
|
3
|
No
|
- Llenando una nueva tabla con los valores obtenidos.
Básica
|
Z
|
x1
|
x2
|
s1
|
s2
|
s3
|
Solución
|
Z
|
1
|
0
|
0
|
0.48
|
0
|
-3.35
|
49.94
|
x2
|
0
|
0
|
1
|
0.03
|
0
|
-1.29
|
0.13
|
S2
|
0
|
0
|
0
|
-0.03
|
1
|
2.29
|
3.87
|
x1
|
0
|
1
|
0
|
0
|
0
|
1
|
3
|
- Hallando fila que sera reemplazada.
Básica
|
s3
|
Solución
|
Relación
|
x2
|
-1.29
|
0.13
|
No
|
S2
|
2.29
|
3.87
|
1.69
|
X1
|
1
|
3
|
3
|
- Calcular nueva Fila(S2):
Básica
|
Z
|
x1
|
x2
|
s1
|
s2
|
s3
|
Solución
|
Z
|
1
|
0
|
0
|
0.44
|
1.46
|
0
|
55.61
|
x2
|
0
|
0
|
1
|
0.01
|
0.57
|
0
|
2.31
|
S2
|
0
|
0
|
0
|
-0.01
|
0.44
|
1
|
1.69
|
x1
|
0
|
1
|
0
|
0.01
|
-0.44
|
0
|
1.31
|
Respuesta:
Z = 55.61
x2 = 2.31
X1 = 1.31
S3 = 1.69
x2 = 2.31
X1 = 1.31
S3 = 1.69











