Matemática discreta Ejemplos

$[\begin{array}{c} a & 15 \\ 2 & b \end{array}] - 2 [\begin{array}{c} 5 & 8 \\ 7 & 10 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 1

Simplifica cada término.

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Paso 1.1

Multiplica $- 2$ por cada elemento de la matriz.

$[\begin{array}{c} a & 15 \\ 2 & b \end{array}] + [\begin{array}{c} - 2 \cdot 5 & - 2 \cdot 8 \\ - 2 \cdot 7 & - 2 \cdot 10 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 1.2

Simplifica cada elemento de la matriz.

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Paso 1.2.1

Multiplica $- 2$ por $5$ .

$[\begin{array}{c} a & 15 \\ 2 & b \end{array}] + [\begin{array}{c} - 10 & - 2 \cdot 8 \\ - 2 \cdot 7 & - 2 \cdot 10 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 1.2.2

Multiplica $- 2$ por $8$ .

$[\begin{array}{c} a & 15 \\ 2 & b \end{array}] + [\begin{array}{c} - 10 & - 16 \\ - 2 \cdot 7 & - 2 \cdot 10 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 1.2.3

Multiplica $- 2$ por $7$ .

$[\begin{array}{c} a & 15 \\ 2 & b \end{array}] + [\begin{array}{c} - 10 & - 16 \\ - 14 & - 2 \cdot 10 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 1.2.4

Multiplica $- 2$ por $10$ .

$[\begin{array}{c} a & 15 \\ 2 & b \end{array}] + [\begin{array}{c} - 10 & - 16 \\ - 14 & - 20 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 2

Suma los elementos correspondientes.

$[\begin{array}{c} a - 10 & 15 - 16 \\ 2 - 14 & b - 20 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 3

Simplify each element.

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Paso 3.1

Resta $16$ de $15$ .

$[\begin{array}{c} a - 10 & - 1 \\ 2 - 14 & b - 20 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 3.2

Resta $14$ de $2$ .

$[\begin{array}{c} a - 10 & - 1 \\ - 12 & b - 20 \end{array}] = [\begin{array}{c} - 3 & - 1 \\ - 16 & 2 \end{array}]$

Paso 4

Write as a linear system of equations.

$a - 10 = - 3$

$- 1 = - 1$

$- 12 = - 16$

$b - 20 = 2$

Paso 5

Since $- 12 \neq - 16$ , the matrix equation has no solution.

No hay solución