Matemática discreta Ejemplos

$x \cdot 1 + x \cdot 2 + x \cdot 3 + s \cdot 1 = 38$ , $- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$ , $x \cdot 3 + s \cdot 3 = 2$ , $- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1

Move variables to the left and constant terms to the right.

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Paso 1.1

Simplifica cada término.

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Paso 1.1.1

Multiplica $x$ por $1$ .

$x + x \cdot 2 + x \cdot 3 + s \cdot 1 = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.1.2

Mueve $2$ a la izquierda de $x$ .

$x + 2 \cdot x + x \cdot 3 + s \cdot 1 = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.1.3

Mueve $3$ a la izquierda de $x$ .

$x + 2 x + 3 \cdot x + s \cdot 1 = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.1.4

Multiplica $s$ por $1$ .

$x + 2 x + 3 x + s = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

$x + 2 x + 3 x + s = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.2

Suma $x$ y $2 x$ .

$3 x + 3 x + s = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.3

Suma $3 x$ y $3 x$ .

$6 x + s = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.4

Reordena $6 x$ y $s$ .

$s + 6 x = 38$

$- x \cdot 1 + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.5

Simplifica cada término.

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Paso 1.5.1

Multiplica $- 1$ por $1$ .

$s + 6 x = 38$

$- x + x \cdot 2 - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.5.2

Mueve $2$ a la izquierda de $x$ .

$s + 6 x = 38$

$- x + 2 \cdot x - x \cdot 3 + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.5.3

Multiplica $3$ por $- 1$ .

$s + 6 x = 38$

$- x + 2 x - 3 x + s \cdot 2 = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.5.4

Mueve $2$ a la izquierda de $s$ .

$s + 6 x = 38$

$- x + 2 x - 3 x + 2 s = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

$s + 6 x = 38$

$- x + 2 x - 3 x + 2 s = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.6

Suma $- x$ y $2 x$ .

$s + 6 x = 38$

$x - 3 x + 2 s = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.7

Resta $3 x$ de $x$ .

$s + 6 x = 38$

$- 2 x + 2 s = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.8

Reordena $- 2 x$ y $2 s$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$x \cdot 3 + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.9

Simplifica cada término.

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Paso 1.9.1

Mueve $3$ a la izquierda de $x$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 \cdot x + s \cdot 3 = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.9.2

Mueve $3$ a la izquierda de $s$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 x + 3 s = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 x + 3 s = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.10

Reordena $3 x$ y $3 s$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 200 x \cdot 1 - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.11

Simplifica cada término.

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Paso 1.11.1

Multiplica $- 200$ por $1$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 200 x - 644 x \cdot 2 - 266 x \cdot 3 + z = 0$

Paso 1.11.2

Multiplica $2$ por $- 644$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 200 x - 1288 x - 266 x \cdot 3 + z = 0$

Paso 1.11.3

Multiplica $3$ por $- 266$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 200 x - 1288 x - 798 x + z = 0$

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 200 x - 1288 x - 798 x + z = 0$

Paso 1.12

Resta $1288 x$ de $- 200 x$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 1488 x - 798 x + z = 0$

Paso 1.13

Resta $798 x$ de $- 1488 x$ .

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 2286 x + z = 0$

$s + 6 x = 38$

$2 s - 2 x = 0$

$3 s + 3 x = 2$

$- 2286 x + z = 0$

Paso 2

Write the system as a matrix.

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 2 & - 2 & 0 & 0 \\ 3 & 3 & 0 & 2 \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3

Obtén la forma escalonada reducida por filas.

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Paso 3.1

Perform the row operation $R_{2} = R_{2} - 2 R_{1}$ to make the entry at $2, 1$ a $0$ .

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Paso 3.1.1

Perform the row operation $R_{2} = R_{2} - 2 R_{1}$ to make the entry at $2, 1$ a $0$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 2 - 2 \cdot 1 & - 2 - 2 \cdot 6 & 0 - 2 \cdot 0 & 0 - 2 \cdot 38 \\ 3 & 3 & 0 & 2 \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.1.2

Simplifica $R_{2}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & - 14 & 0 & - 76 \\ 3 & 3 & 0 & 2 \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.2

Perform the row operation $R_{3} = R_{3} - 3 R_{1}$ to make the entry at $3, 1$ a $0$ .

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Paso 3.2.1

Perform the row operation $R_{3} = R_{3} - 3 R_{1}$ to make the entry at $3, 1$ a $0$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & - 14 & 0 & - 76 \\ 3 - 3 \cdot 1 & 3 - 3 \cdot 6 & 0 - 3 \cdot 0 & 2 - 3 \cdot 38 \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.2.2

Simplifica $R_{3}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & - 14 & 0 & - 76 \\ 0 & - 15 & 0 & - 112 \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.3

Multiply each element of $R_{2}$ by $- \frac{1}{14}$ to make the entry at $2, 2$ a $1$ .

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Paso 3.3.1

Multiply each element of $R_{2}$ by $- \frac{1}{14}$ to make the entry at $2, 2$ a $1$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ - \frac{1}{14} \cdot 0 & - \frac{1}{14} \cdot - 14 & - \frac{1}{14} \cdot 0 & - \frac{1}{14} \cdot - 76 \\ 0 & - 15 & 0 & - 112 \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.3.2

Simplifica $R_{2}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & - 15 & 0 & - 112 \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.4

Perform the row operation $R_{3} = R_{3} + 15 R_{2}$ to make the entry at $3, 2$ a $0$ .

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Paso 3.4.1

Perform the row operation $R_{3} = R_{3} + 15 R_{2}$ to make the entry at $3, 2$ a $0$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 + 15 \cdot 0 & - 15 + 15 \cdot 1 & 0 + 15 \cdot 0 & - 112 + 15 (\frac{38}{7}) \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.4.2

Simplifica $R_{3}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & 0 & 0 & - \frac{214}{7} \\ 0 & - 2286 & 1 & 0 \end{array}]$

Paso 3.5

Perform the row operation $R_{4} = R_{4} + 2286 R_{2}$ to make the entry at $4, 2$ a $0$ .

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Paso 3.5.1

Perform the row operation $R_{4} = R_{4} + 2286 R_{2}$ to make the entry at $4, 2$ a $0$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & 0 & 0 & - \frac{214}{7} \\ 0 + 2286 \cdot 0 & - 2286 + 2286 \cdot 1 & 1 + 2286 \cdot 0 & 0 + 2286 (\frac{38}{7}) \end{array}]$

Paso 3.5.2

Simplifica $R_{4}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & 0 & 0 & - \frac{214}{7} \\ 0 & 0 & 1 & \frac{86868}{7} \end{array}]$

Paso 3.6

Swap $R_{4}$ with $R_{3}$ to put a nonzero entry at $3, 3$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & 0 & 1 & \frac{86868}{7} \\ 0 & 0 & 0 & - \frac{214}{7} \end{array}]$

Paso 3.7

Multiply each element of $R_{4}$ by $- \frac{7}{214}$ to make the entry at $4, 4$ a $1$ .

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Paso 3.7.1

Multiply each element of $R_{4}$ by $- \frac{7}{214}$ to make the entry at $4, 4$ a $1$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & 0 & 1 & \frac{86868}{7} \\ - \frac{7}{214} \cdot 0 & - \frac{7}{214} \cdot 0 & - \frac{7}{214} \cdot 0 & - \frac{7}{214} (- \frac{214}{7}) \end{array}]$

Paso 3.7.2

Simplifica $R_{4}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & 0 & 1 & \frac{86868}{7} \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.8

Perform the row operation $R_{3} = R_{3} - \frac{86868}{7} R_{4}$ to make the entry at $3, 4$ a $0$ .

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Paso 3.8.1

Perform the row operation $R_{3} = R_{3} - \frac{86868}{7} R_{4}$ to make the entry at $3, 4$ a $0$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 - \frac{86868}{7} \cdot 0 & 0 - \frac{86868}{7} \cdot 0 & 1 - \frac{86868}{7} \cdot 0 & \frac{86868}{7} - \frac{86868}{7} \cdot 1 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.8.2

Simplifica $R_{3}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & \frac{38}{7} \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.9

Perform the row operation $R_{2} = R_{2} - \frac{38}{7} R_{4}$ to make the entry at $2, 4$ a $0$ .

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Paso 3.9.1

Perform the row operation $R_{2} = R_{2} - \frac{38}{7} R_{4}$ to make the entry at $2, 4$ a $0$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 - \frac{38}{7} \cdot 0 & 1 - \frac{38}{7} \cdot 0 & 0 - \frac{38}{7} \cdot 0 & \frac{38}{7} - \frac{38}{7} \cdot 1 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.9.2

Simplifica $R_{2}$ .

$[\begin{array}{c} 1 & 6 & 0 & 38 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.10

Perform the row operation $R_{1} = R_{1} - 38 R_{4}$ to make the entry at $1, 4$ a $0$ .

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Paso 3.10.1

Perform the row operation $R_{1} = R_{1} - 38 R_{4}$ to make the entry at $1, 4$ a $0$ .

$[\begin{array}{c} 1 - 38 \cdot 0 & 6 - 38 \cdot 0 & 0 - 38 \cdot 0 & 38 - 38 \cdot 1 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.10.2

Simplifica $R_{1}$ .

$[\begin{array}{c} 1 & 6 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.11

Perform the row operation $R_{1} = R_{1} - 6 R_{2}$ to make the entry at $1, 2$ a $0$ .

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Paso 3.11.1

Perform the row operation $R_{1} = R_{1} - 6 R_{2}$ to make the entry at $1, 2$ a $0$ .

$[\begin{array}{c} 1 - 6 \cdot 0 & 6 - 6 \cdot 1 & 0 - 6 \cdot 0 & 0 - 6 \cdot 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 3.11.2

Simplifica $R_{1}$ .

$[\begin{array}{c} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array}]$

Paso 4

Use the result matrix to declare the final solution to the system of equations.

$s = 0$

$x = 0$

$z = 0$

$0 = 1$

Paso 5

The system is inconsistent so there is no solution.

$No hay solución$