线性代数示例

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

解题步骤 1

Perform the row operation $R_{2} = R_{2} - 3 R_{1}$ to make the entry at $2, 1$ a $0$ .

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解题步骤 1.1

Perform the row operation $R_{2} = R_{2} - 3 R_{1}$ to make the entry at $2, 1$ a $0$ .

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

解题步骤 1.2

化简 $R_{2}$ 。

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

解题步骤 2

Perform the row operation $R_{4} = R_{4} - 3 R_{1}$ to make the entry at $4, 1$ a $0$ .

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解题步骤 2.1

Perform the row operation $R_{4} = R_{4} - 3 R_{1}$ to make the entry at $4, 1$ a $0$ .

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

解题步骤 2.2

化简 $R_{4}$ 。

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

解题步骤 3

Swap $R_{3}$ with $R_{2}$ to put a nonzero entry at $2, 2$ .

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

解题步骤 4

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

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解题步骤 4.1

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

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

解题步骤 4.2

化简 $R_{4}$ 。

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

线性代数 示例