有限数学示例

$[\begin{array}{c} 1 & 1 & 1 & 19 \\ 2 & 3 & 7 & 29 \end{array}]$

解题步骤 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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解题步骤 1.1

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

$[\begin{array}{c} 1 & 1 & 1 & 19 \\ 2 - 2 \cdot 1 & 3 - 2 \cdot 1 & 7 - 2 \cdot 1 & 29 - 2 \cdot 19 \end{array}]$

解题步骤 1.2

化简 $R_{2}$ 。

$[\begin{array}{c} 1 & 1 & 1 & 19 \\ 0 & 1 & 5 & - 9 \end{array}]$

解题步骤 2

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

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解题步骤 2.1

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

$[\begin{array}{c} 1 - 0 & 1 - 1 & 1 - 5 & 19 + 9 \\ 0 & 1 & 5 & - 9 \end{array}]$

解题步骤 2.2

化简 $R_{1}$ 。

$[\begin{array}{c} 1 & 0 & - 4 & 28 \\ 0 & 1 & 5 & - 9 \end{array}]$

有限数学 示例