14 метод гаусса

(2x 3y = 7;

(5x + 3y = 13;

(x + 5y = 6;

x + 2y

= 7;

4x 3y = 5;

5x 3y = 2;

(3x 5y = 4;

(2x + 3y = 19:

(8x 7y = 11;

4x + 3y = 27;

2x + 7y = 13;

4x 7y = 1;

82x + 3y + 2z = 8;

82x + 9y 4z = 1;

>

x + y + z

= 3;

>

x + 5y + z

= 7;

<5x + y 3z

= 7;

<3x + 3y + z

= 5;

>x + 2y + 2z

= 3;

>

x + 2y z

= 4;

:

:

82x + 3y + 5z = 10;

8 2x + 3y + 4z = 11;

>

>

<3x + 7y + 4z = 3;

<4x + 3y 2z

= 11;

>x + y + 2z

= 1;

>x + 2y + 3z = 11;

:

:

82x

y + 2z =

4;

82x + 3y + z = 5;

>

>

<4x + y + 4z = 2;

<3x + 2y + z = 1;

>x + 3y z

= 10;

>x + 2y 3z

= 2;

:

:

82x + 5y + z = 29;

8

4x + y + 5z = 5;

>

>

<4x + y + 2z = 31;

<

3x + 4y + z = 4;

>

>

:

:

2

(группы 15118 19, УП)

Задания для самостоятельной работы

Задание 3. Решите системы уравнений

= 0;

82x + 3y z = 6;

8x + 5y z

>

x + y + z

= 9;

>

2x + 8y + 3z = 5;

<3x y + 2z = 10;

<x y + 4z

= 5;

>x + 2y + 3z

= 5;

>x 4y + 5z = 6;

:

:

83x + 5y

z

= 23;

82x + 3y

z = 23;

>

8y

5z = 5;

>

y

<4x

<3x

3z = 8:

>

>

:

:

(7;4;3).

(1;0;1);(4;2;1),

(1;3;5),

(1;2;2),(2;2;3);(5;3;4),(10;5;6).

(3;2;2),(1;3;1);

(0;1;2);

(3;1),(5;3).(1;2;0),

(3;5),

Отгадки:(1;3),(2;1),(1;1);