Matemática, perguntado por saraolicontatos, 5 meses atrás

Resolva os sistemas lineares

Anexos:

Soluções para a tarefa

Respondido por MisterCardosoBoss
2

Resposta:

Explicação passo a passo:

A)

7p = 14

p = 14/7

p = 2

6w + 2p = 30 (:2)

3w + p = 15

3w + 2 = 15

3w = 15 - 2

3W = 13

w = 13/3

4z - 8w - 7p = 8

4z - 8.13/3 - 7.2 = 8

4z - 104/3 - 14 = - 8

4z - 104/3 = - 8 + 14

4z - 104/3 = 6

(3.4z - 104)/3 = 3.6/3

12z - 104 = 18

12z = 18 + 104

12z = 122 (:2)

6z = 61

Z= 61/6

2y - 5z - 7w - 4p = 10

2y - 5.61/6 - 7.13/3 - 4.2 = 10

2y - 305/6 - 91/3 - 8 = 10

Mmc (3,6)=6

(6.2y - 305 - 2.91 - 6.8)/6 = 6.10/6

12y - 305 - 182 - 48 = 60

12y - 487 = 60+48

12y = 108 + 487

12y = 595

Y = 595/12

3x + 2y + 6z + 4w + p = 12

3x + 2.595/12 + 6.61/6 + 4.13/3 + 2 = 12

3x + 595/6 + 61 + 52/3 = 12-2

3x + 595/6 + 61 + 52/3 = 10

3x = 10 - 61 - 595/6 - 52/3

3x = - 51 - 595/6 - 52/3

6.3x/6 = [6.(-51) - 595 - 2.52]/6

18x = - 306 - 595 - 104

18x = - 410 - 595

18x = - 1005

X = - 1005/18

__________

B)

x + 3y + 6z - 4w + 7t = 20

x + 3.271/16 + 6.(-11/4) - 4.(-6) + 7.9 = 20

x + 813/16 - 66/4 (:2)/(:2) + 24 + 63 = 20

x + 813/16 - 33/2 + 87-20= 0

x + 813/16 - 33/2 + 67 = 0

x = 33/2 - 67 - 813/16

16x/16= (8.33 - 67.16 - 813)/16

16x = 264 - 1072 - 813

16x = 264 - 1885

16x = 1621

X = 1621/16

____________

1885

- 264

--------

1621

1072

+813

--------

1885

67

X16

------

402

67

-------

1072

________

4y - 7z + 3w - 5t = 24

4y - 7.(-11/4) + 3.(-6) - 5.9 = 24

4y + 77/4 - 18 - 45 = 24

4y + 77/4 - 63 = 24

4y + 77/4 = 24 + 63

4y + 77/4 = 87

4y = 87 - 77/4

4.4y/4 = (4.87 - 77)/4

16y = 348 - 77

16y = 271

Y = 271/16

4z + 6w + 8t = 25

4z + 6.(-6) + 8.9 = 25

4z - 36 + 72 = 25

4z + 36 = 25

4z = 25 - 36

4z = - 11

z= - 11/4

9w+ 7t = 9

9w + 7.9 = 9

9w + 63 = 9

9w = 9 - 63

9w = - 54

w = - 54/9

w= - 6

9t = 81

t = 81/9

t = 9

__________

C)

7x + 5y + 3z - 9f = 20

7x + 5.(-245/16) + 3.65/4 - 9.5 = 20

7x - 1225/16 + 195/4 - 45 = 20

7x - 1225/16 + 195/4 = 20+45

(16.7x -1225 +4.195)/16 = 16.65/16

(112x - 1225 + 780)= 1040

112x - 445 = 1040

112X = 1485

x = 1485/112

4y + 5z + 4f = 40

4y + 5.65/4 + 4.5 = 40

4y + 325/4 + 20 = 40

4y + 325/4 = 40 - 20

4y + 325/4 = 20

(4.4y + 325)/4 = 20.4/4

16y + 325 = 80

16y = 80 - 325

16y = -245

y = - 245/16

4z - 7f = 30

4z - 7.5 = 30

4z - 35 = 30

4z = 30+35

4z = 65

z = 65/4

8f = 40

F = 40/8

F = 5

______________

D)

4x - 7y + 8z = 36

6y + 8z = 20

4z = 20

z = 20/4

z = 5

6y + 8z = 20

6y + 8.5 = 20

6y + 40 = 20

6y = 20 - 40

6y = - 20 (:2)

3y = - 10

y = - 10/3

4x - 7y + 8z = 36

4x - 7.(-10/3) + 8.5 = 36

4x + 70/3 + 40 = 36

4x + 70/3 = 36 - 40

4x + 70/3 = - 4

(3.4x + 70)/4 = 3.(-4)/3

12x + 70 = - 12

12x = - 12 - 70

12x = - 84

x = - 84/12

X = - 7

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