Matemática discreta Exemplos

⎡ ⎢ ⎣ \begin{matrix} 1 & 1 & 1 3 & 1 & - 3 1 & - 2 & - 5 \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} 1 & 1 & 1 \\ 3 & 1 & - 3 \\ 1 & - 2 & - 5 \end{array}]$

Etapa 1

Escreva a matriz como um produto de uma matriz triangular inferior e uma matriz triangular superior.

⎡ ⎢ ⎣ \begin{matrix} 1 & 0 & 0 l_{21} & 1 & 0 l_{31} & l_{32} & 1 \end{matrix} ⎤ ⎥ ⎦ ⎡ ⎢ ⎣ \begin{matrix} u_{11} & u_{12} & u_{13} 0 & u_{22} & u_{23} 0 & 0 & u_{33} \end{matrix} ⎤ ⎥ ⎦ = ⎡ ⎢ ⎣ \begin{matrix} 1 & 1 & 1 3 & 1 & - 3 1 & - 2 & - 5 \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} 1 & 0 & 0 \\ l_{21} & 1 & 0 \\ l_{31} & l_{32} & 1 \end{array}] [\begin{array}{c} u_{11} & u_{12} & u_{13} \\ 0 & u_{22} & u_{23} \\ 0 & 0 & u_{33} \end{array}] = [\begin{array}{c} 1 & 1 & 1 \\ 3 & 1 & - 3 \\ 1 & - 2 & - 5 \end{array}]$

Etapa 2

Multiplique

⎡ ⎢ ⎣ \begin{matrix} 1 & 0 & 0 l_{21} & 1 & 0 l_{31} & l_{32} & 1 \end{matrix} ⎤ ⎥ ⎦ ⎡ ⎢ ⎣ \begin{matrix} u_{11} & u_{12} & u_{13} 0 & u_{22} & u_{23} 0 & 0 & u_{33} \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} 1 & 0 & 0 \\ l_{21} & 1 & 0 \\ l_{31} & l_{32} & 1 \end{array}] [\begin{array}{c} u_{11} & u_{12} & u_{13} \\ 0 & u_{22} & u_{23} \\ 0 & 0 & u_{33} \end{array}]$ .

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Etapa 2.1

Duas matrizes podem ser multiplicadas se e somente se o número de colunas da primeira matriz for igual ao número de linhas da segunda matriz. Nesse caso, a primeira matriz é

3 \times 3

$3 \times 3$ e a segunda matriz é

3 \times 3

$3 \times 3$ .

Etapa 2.2

Multiplique cada linha na primeira matriz por cada coluna na segunda matriz.

⎡ ⎢ ⎣ \begin{matrix} 1 u_{11} + 0 \cdot 0 + 0 \cdot 0 & 1 u_{12} + 0 u_{22} + 0 \cdot 0 & 1 u_{13} + 0 u_{23} + 0 u_{33} l_{21} u_{11} + 1 \cdot 0 + 0 \cdot 0 & l_{21} u_{12} + 1 u_{22} + 0 \cdot 0 & l_{21} u_{13} + 1 u_{23} + 0 u_{33} l_{31} u_{11} + l_{32} \cdot 0 + 1 \cdot 0 & l_{31} u_{12} + l_{32} u_{22} + 1 \cdot 0 & l_{31} u_{13} + l_{32} u_{23} + 1 u_{33} \end{matrix} ⎤ ⎥ ⎦ = ⎡ ⎢ ⎣ \begin{matrix} 1 & 1 & 1 3 & 1 & - 3 1 & - 2 & - 5 \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} 1 u_{11} + 0 \cdot 0 + 0 \cdot 0 & 1 u_{12} + 0 u_{22} + 0 \cdot 0 & 1 u_{13} + 0 u_{23} + 0 u_{33} \\ l_{21} u_{11} + 1 \cdot 0 + 0 \cdot 0 & l_{21} u_{12} + 1 u_{22} + 0 \cdot 0 & l_{21} u_{13} + 1 u_{23} + 0 u_{33} \\ l_{31} u_{11} + l_{32} \cdot 0 + 1 \cdot 0 & l_{31} u_{12} + l_{32} u_{22} + 1 \cdot 0 & l_{31} u_{13} + l_{32} u_{23} + 1 u_{33} \end{array}] = [\begin{array}{c} 1 & 1 & 1 \\ 3 & 1 & - 3 \\ 1 & - 2 & - 5 \end{array}]$

Etapa 2.3

Simplifique cada elemento da matriz multiplicando todas as expressões.

⎡ ⎢ ⎣ \begin{matrix} u_{11} & u_{12} & u_{13} l_{21} u_{11} & l_{21} u_{12} + u_{22} & l_{21} u_{13} + u_{23} l_{31} u_{11} & l_{31} u_{12} + l_{32} u_{22} & l_{31} u_{13} + l_{32} u_{23} + u_{33} \end{matrix} ⎤ ⎥ ⎦ = ⎡ ⎢ ⎣ \begin{matrix} 1 & 1 & 1 3 & 1 & - 3 1 & - 2 & - 5 \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} u_{11} & u_{12} & u_{13} \\ l_{21} u_{11} & l_{21} u_{12} + u_{22} & l_{21} u_{13} + u_{23} \\ l_{31} u_{11} & l_{31} u_{12} + l_{32} u_{22} & l_{31} u_{13} + l_{32} u_{23} + u_{33} \end{array}] = [\begin{array}{c} 1 & 1 & 1 \\ 3 & 1 & - 3 \\ 1 & - 2 & - 5 \end{array}]$

⎡ ⎢ ⎣ \begin{matrix} u_{11} & u_{12} & u_{13} l_{21} u_{11} & l_{21} u_{12} + u_{22} & l_{21} u_{13} + u_{23} l_{31} u_{11} & l_{31} u_{12} + l_{32} u_{22} & l_{31} u_{13} + l_{32} u_{23} + u_{33} \end{matrix} ⎤ ⎥ ⎦ = ⎡ ⎢ ⎣ \begin{matrix} 1 & 1 & 1 3 & 1 & - 3 1 & - 2 & - 5 \end{matrix} ⎤ ⎥ ⎦

Etapa 3

Resolva.

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Etapa 3.1

Escreva como um sistema linear de equações.

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{11} = 3

$l_{21} u_{11} = 3$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{11} = 1

$l_{31} u_{11} = 1$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

Etapa 3.2

Resolva o sistema de equações.

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Etapa 3.2.1

Substitua todas as ocorrências de

u_{11}

$u_{11}$ por

1

$1$ em cada equação.

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Etapa 3.2.1.1

Substitua todas as ocorrências de

u_{11}

$u_{11}$ em

l_{21} u_{11} = 3

$l_{21} u_{11} = 3$ por

1

$1$ .

l_{21} \cdot 1 = 3

$l_{21} \cdot 1 = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{11} = 1

$l_{31} u_{11} = 1$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

Etapa 3.2.1.2

Simplifique o lado esquerdo.

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Etapa 3.2.1.2.1

Multiplique

l_{21}

$l_{21}$ por

1

$1$ .

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{11} = 1

$l_{31} u_{11} = 1$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{11} = 1

$l_{31} u_{11} = 1$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

Etapa 3.2.1.3

Substitua todas as ocorrências de

u_{11}

$u_{11}$ em

l_{31} u_{11} = 1

$l_{31} u_{11} = 1$ por

1

$1$ .

l_{31} \cdot 1 = 1

$l_{31} \cdot 1 = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

Etapa 3.2.1.4

Simplifique o lado esquerdo.

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Etapa 3.2.1.4.1

Multiplique

l_{31}

$l_{31}$ por

1

$1$ .

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

Etapa 3.2.2

Substitua todas as ocorrências de

l_{31}

$l_{31}$ por

1

$1$ em cada equação.

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Etapa 3.2.2.1

Substitua todas as ocorrências de

l_{31}

$l_{31}$ em

l_{31} u_{12} + l_{32} u_{22} = - 2

$l_{31} u_{12} + l_{32} u_{22} = - 2$ por

1

$1$ .

1 \cdot u_{12} + l_{32} u_{22} = - 2

$1 \cdot u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

Etapa 3.2.2.2

Simplifique o lado esquerdo.

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Etapa 3.2.2.2.1

Multiplique

u_{12}

$u_{12}$ por

1

$1$ .

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$

Etapa 3.2.2.3

Substitua todas as ocorrências de

l_{31}

$l_{31}$ em

l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5

$l_{31} u_{13} + l_{32} u_{23} + u_{33} = - 5$ por

1

$1$ .

1 \cdot u_{13} + l_{32} u_{23} + u_{33} = - 5

$1 \cdot u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

Etapa 3.2.2.4

Simplifique o lado esquerdo.

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Etapa 3.2.2.4.1

Multiplique

u_{13}

$u_{13}$ por

1

$1$ .

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

Etapa 3.2.3

Substitua todas as ocorrências de

l_{21}

$l_{21}$ por

3

$3$ em cada equação.

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Etapa 3.2.3.1

Substitua todas as ocorrências de

l_{21}

$l_{21}$ em

l_{21} u_{12} + u_{22} = 1

$l_{21} u_{12} + u_{22} = 1$ por

3

$3$ .

3 \cdot u_{12} + u_{22} = 1

$3 \cdot u_{12} + u_{22} = 1$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

Etapa 3.2.3.2

Simplifique o lado esquerdo.

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Etapa 3.2.3.2.1

Multiplique

3

$3$ por

u_{12}

$u_{12}$ .

3 u_{12} + u_{22} = 1

$3 u_{12} + u_{22} = 1$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

3 u_{12} + u_{22} = 1

$3 u_{12} + u_{22} = 1$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$

Etapa 3.2.3.3

Substitua todas as ocorrências de

l_{21}

$l_{21}$ em

l_{21} u_{13} + u_{23} = - 3

$l_{21} u_{13} + u_{23} = - 3$ por

3

$3$ .

3 \cdot u_{13} + u_{23} = - 3

$3 \cdot u_{13} + u_{23} = - 3$

3 u_{12} + u_{22} = 1

$3 u_{12} + u_{22} = 1$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.3.4

Simplifique o lado esquerdo.

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Etapa 3.2.3.4.1

Multiplique

3

$3$ por

u_{13}

$u_{13}$ .

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

3 u_{12} + u_{22} = 1

$3 u_{12} + u_{22} = 1$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

3 u_{12} + u_{22} = 1

$3 u_{12} + u_{22} = 1$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

3 u_{12} + u_{22} = 1

$3 u_{12} + u_{22} = 1$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.4

Substitua todas as ocorrências de

u_{12}

$u_{12}$ por

1

$1$ em cada equação.

Toque para ver mais passagens...

Etapa 3.2.4.1

Substitua todas as ocorrências de

u_{12}

$u_{12}$ em

3 u_{12} + u_{22} = 1

$3 u_{12} + u_{22} = 1$ por

1

$1$ .

3 (1) + u_{22} = 1

$3 (1) + u_{22} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.4.2

Simplifique o lado esquerdo.

Toque para ver mais passagens...

Etapa 3.2.4.2.1

Multiplique

3

$3$ por

1

$1$ .

3 + u_{22} = 1

$3 + u_{22} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

3 + u_{22} = 1

$3 + u_{22} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.4.3

Substitua todas as ocorrências de

u_{12}

$u_{12}$ em

u_{12} + l_{32} u_{22} = - 2

$u_{12} + l_{32} u_{22} = - 2$ por

1

$1$ .

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

3 + u_{22} = 1

$3 + u_{22} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.4.4

Simplifique o lado esquerdo.

Toque para ver mais passagens...

Etapa 3.2.4.4.1

Remova os parênteses.

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

3 + u_{22} = 1

$3 + u_{22} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

3 + u_{22} = 1

$3 + u_{22} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

3 + u_{22} = 1

$3 + u_{22} = 1$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.5

Substitua todas as ocorrências de

u_{13}

$u_{13}$ por

1

$1$ em cada equação.

Toque para ver mais passagens...

Etapa 3.2.5.1

Mova todos os termos que não contêm

u_{22}

$u_{22}$ para o lado direito da equação.

Toque para ver mais passagens...

Etapa 3.2.5.1.1

Subtraia

3

$3$ dos dois lados da equação.

u_{22} = 1 - 3

$u_{22} = 1 - 3$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.5.1.2

Subtraia

3

$3$ de

1

$1$ .

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.5.2

Substitua todas as ocorrências de

u_{13}

$u_{13}$ em

3 u_{13} + u_{23} = - 3

$3 u_{13} + u_{23} = - 3$ por

1

$1$ .

3 (1) + u_{23} = - 3

$3 (1) + u_{23} = - 3$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.5.3

Simplifique o lado esquerdo.

Toque para ver mais passagens...

Etapa 3.2.5.3.1

Multiplique

3

$3$ por

1

$1$ .

3 + u_{23} = - 3

$3 + u_{23} = - 3$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

3 + u_{23} = - 3

$3 + u_{23} = - 3$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.5.4

Substitua todas as ocorrências de

u_{13}

$u_{13}$ em

u_{13} + l_{32} u_{23} + u_{33} = - 5

$u_{13} + l_{32} u_{23} + u_{33} = - 5$ por

1

$1$ .

1 + l_{32} u_{23} + u_{33} = - 5

$1 + l_{32} u_{23} + u_{33} = - 5$

3 + u_{23} = - 3

$3 + u_{23} = - 3$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.5.5

Simplifique o lado esquerdo.

Toque para ver mais passagens...

Etapa 3.2.5.5.1

Remova os parênteses.

1 + l_{32} u_{23} + u_{33} = - 5

$1 + l_{32} u_{23} + u_{33} = - 5$

3 + u_{23} = - 3

$3 + u_{23} = - 3$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

1 + l_{32} u_{23} + u_{33} = - 5

$1 + l_{32} u_{23} + u_{33} = - 5$

3 + u_{23} = - 3

$3 + u_{23} = - 3$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

1 + l_{32} u_{23} + u_{33} = - 5

$1 + l_{32} u_{23} + u_{33} = - 5$

3 + u_{23} = - 3

$3 + u_{23} = - 3$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

l_{31} = 1

$l_{31} = 1$

l_{21} = 3

$l_{21} = 3$

u_{11} = 1

$u_{11} = 1$

u_{12} = 1

$u_{12} = 1$

u_{13} = 1

$u_{13} = 1$

Etapa 3.2.6

Substitua todas as ocorrências de

u_{22}

$u_{22}$ por

- 2

$- 2$ em cada equação.

Toque para ver mais passagens...

Etapa 3.2.6.1

Mova todos os termos que não contêm

u_{23}

$u_{23}$ para o lado direito da equação.

Toque para ver mais passagens...

Etapa 3.2.6.1.1

Subtraia

3

$3$ dos dois lados da equação.

u_{23} = - 3 - 3

$u_{23} = - 3 - 3$

1 + l_{32} u_{23} + u_{33} = - 5

$1 + l_{32} u_{23} + u_{33} = - 5$

u_{22} = - 2

$u_{22} = - 2$

1 + l_{32} u_{22} = - 2

$1 + l_{32} u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.6.1.2

Subtraia

$3$ de

$- 3$ .

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$1 + l_{32} u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$1 + l_{32} u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.6.2

Substitua todas as ocorrências de

$u_{22}$ em

$1 + l_{32} u_{22} = - 2$ por

$- 2$ .

$1 + l_{32} \cdot - 2 = - 2$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.6.3

Simplifique o lado esquerdo.

Toque para ver mais passagens...

Etapa 3.2.6.3.1

Mova

$- 2$ para a esquerda de

$l_{32}$ .

$1 - 2 l_{32} = - 2$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$1 - 2 l_{32} = - 2$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$1 - 2 l_{32} = - 2$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7

Substitua todas as ocorrências de

$u_{23}$ por

$- 6$ em cada equação.

Toque para ver mais passagens...

Etapa 3.2.7.1

Mova todos os termos que não contêm

$l_{32}$ para o lado direito da equação.

Toque para ver mais passagens...

Etapa 3.2.7.1.1

Subtraia

$1$ dos dois lados da equação.

$- 2 l_{32} = - 2 - 1$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7.1.2

Subtraia

$1$ de

$- 2$ .

$- 2 l_{32} = - 3$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$- 2 l_{32} = - 3$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7.2

Divida cada termo em

$- 2 l_{32} = - 3$ por

$- 2$ e simplifique.

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Etapa 3.2.7.2.1

Divida cada termo em

$- 2 l_{32} = - 3$ por

$- 2$ .

$\frac{- 2 l_{32}}{- 2} = \frac{- 3}{- 2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7.2.2

Simplifique o lado esquerdo.

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Etapa 3.2.7.2.2.1

Cancele o fator comum de

$- 2$ .

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Etapa 3.2.7.2.2.1.1

Cancele o fator comum.

$\frac{- 2 l_{32}}{- 2} = \frac{- 3}{- 2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7.2.2.1.2

Divida

$l_{32}$ por

$1$ .

$l_{32} = \frac{- 3}{- 2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$l_{32} = \frac{- 3}{- 2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$l_{32} = \frac{- 3}{- 2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7.2.3

Simplifique o lado direito.

Toque para ver mais passagens...

Etapa 3.2.7.2.3.1

Dividir dois valores negativos resulta em um valor positivo.

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$1 + l_{32} u_{23} + u_{33} = - 5$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7.3

Substitua todas as ocorrências de

$u_{23}$ em

$1 + l_{32} u_{23} + u_{33} = - 5$ por

$- 6$ .

$1 + l_{32} \cdot - 6 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.7.4

Simplifique o lado esquerdo.

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Etapa 3.2.7.4.1

Mova

$- 6$ para a esquerda de

$l_{32}$ .

$1 - 6 l_{32} + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$1 - 6 l_{32} + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$1 - 6 l_{32} + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.8

Substitua todas as ocorrências de

$l_{32}$ por

$\frac{3}{2}$ em cada equação.

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Etapa 3.2.8.1

Substitua todas as ocorrências de

$l_{32}$ em

$1 - 6 l_{32} + u_{33} = - 5$ por

$\frac{3}{2}$ .

$1 - 6 (\frac{3}{2}) + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.8.2

Simplifique o lado esquerdo.

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Etapa 3.2.8.2.1

Simplifique

$1 - 6 (\frac{3}{2}) + u_{33}$ .

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Etapa 3.2.8.2.1.1

Simplifique cada termo.

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Etapa 3.2.8.2.1.1.1

Cancele o fator comum de

$2$ .

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Etapa 3.2.8.2.1.1.1.1

Fatore

$2$ de

$- 6$ .

$1 + 2 (- 3) (\frac{3}{2}) + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.8.2.1.1.1.2

Cancele o fator comum.

$1 + 2 \cdot (- 3 (\frac{3}{2})) + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.8.2.1.1.1.3

Reescreva a expressão.

$1 - 3 \cdot 3 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$1 - 3 \cdot 3 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.8.2.1.1.2

Multiplique

$- 3$ por

$3$ .

$1 - 9 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$1 - 9 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.8.2.1.2

Subtraia

$9$ de

$1$ .

$- 8 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$- 8 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$- 8 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$- 8 + u_{33} = - 5$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.9

Mova todos os termos que não contêm

$u_{33}$ para o lado direito da equação.

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Etapa 3.2.9.1

Some

$8$ aos dois lados da equação.

$u_{33} = - 5 + 8$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.9.2

Some

$- 5$ e

$8$ .

$u_{33} = 3$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

$u_{33} = 3$

$l_{32} = \frac{3}{2}$

$u_{23} = - 6$

$u_{22} = - 2$

$l_{31} = 1$

$l_{21} = 3$

$u_{11} = 1$

$u_{12} = 1$

$u_{13} = 1$

Etapa 3.2.10

Resolva o sistema de equações.

$u_{33} = 3 l_{32} = \frac{3}{2} u_{23} = - 6 u_{22} = - 2 l_{31} = 1 l_{21} = 3 u_{11} = 1 u_{12} = 1 u_{13} = 1$

Etapa 3.2.11

Liste todas as soluções.

$u_{33} = 3, l_{32} = \frac{3}{2}, u_{23} = - 6, u_{22} = - 2, l_{31} = 1, l_{21} = 3, u_{11} = 1, u_{12} = 1, u_{13} = 1$

Etapa 4

Substitua nos valores resolvidos.

$[\begin{array}{c} 1 & 1 & 1 \\ 3 & 1 & - 3 \\ 1 & - 2 & - 5 \end{array}] = [\begin{array}{c} 1 & 0 & 0 \\ 3 & 1 & 0 \\ 1 & \frac{3}{2} & 1 \end{array}] [\begin{array}{c} 1 & 1 & 1 \\ 0 & - 2 & - 6 \\ 0 & 0 & 3 \end{array}]$

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