线性代数示例

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = a [\begin{array}{c} 1 \\ - 1 \\ 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = a [\begin{array}{c} 1 \\ - 1 \\ 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1

化简。

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解题步骤 1.1

化简每一项。

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解题步骤 1.1.1

将

a

$a$ 乘以矩阵中的每一个元素。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \cdot 1 \\ a \cdot - 1 \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \cdot 1 \\ a \cdot - 1 \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.2

化简矩阵中的每一个元素。

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解题步骤 1.1.2.1

将

a

$a$ 乘以

1

$1$ 。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ a \cdot - 1 \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ a \cdot - 1 \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.2.2

将

- 1

$- 1$ 移到

a

$a$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - 1 \cdot a \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - 1 \cdot a \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.2.3

将

- 1 a

$- 1 a$ 重写为

- a

$- a$ 。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ a \cdot 8 \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.2.4

将

8

$8$ 移到

a

$a$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + b [\begin{array}{c} 2 \\ 1 \\ 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

解题步骤 1.1.3

将

b

$b$ 乘以矩阵中的每一个元素。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} b \cdot 2 \\ b \cdot 1 \\ b \cdot 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} b \cdot 2 \\ b \cdot 1 \\ b \cdot 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.4

化简矩阵中的每一个元素。

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解题步骤 1.1.4.1

将

2

$2$ 移到

b

$b$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \cdot 1 \\ b \cdot 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \cdot 1 \\ b \cdot 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.4.2

将

b

$b$ 乘以

1

$1$ 。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ b \cdot 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ b \cdot 7 \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.4.3

将

7

$7$ 移到

b

$b$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + c [\begin{array}{c} 1 \\ 3 \\ - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

解题步骤 1.1.5

将

c

$c$ 乘以矩阵中的每一个元素。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \cdot 1 \\ c \cdot 3 \\ c \cdot - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \cdot 1 \\ c \cdot 3 \\ c \cdot - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.6

化简矩阵中的每一个元素。

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解题步骤 1.1.6.1

将

c

$c$ 乘以

1

$1$ 。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ c \cdot 3 \\ c \cdot - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ c \cdot 3 \\ c \cdot - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.6.2

将

3

$3$ 移到

c

$c$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ c \cdot - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ c \cdot - 4 \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

解题步骤 1.1.6.3

将

- 4

$- 4$ 移到

c

$c$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]$

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + d [\begin{array}{c} 3 \\ - 4 \\ 36 \end{array}]

解题步骤 1.1.7

将

d

$d$ 乘以矩阵中的每一个元素。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} d \cdot 3 \\ d \cdot - 4 \\ d \cdot 36 \end{array}]

解题步骤 1.1.8

化简矩阵中的每一个元素。

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解题步骤 1.1.8.1

将

3

$3$ 移到

d

$d$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} 3 d \\ d \cdot - 4 \\ d \cdot 36 \end{array}]

解题步骤 1.1.8.2

将

- 4

$- 4$ 移到

d

$d$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ d \cdot 36 \end{array}]

解题步骤 1.1.8.3

将

36

$36$ 移到

d

$d$ 的左侧。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ 36 d \end{array}]

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ 36 d \end{array}]

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a \\ - a \\ 8 a \end{array}] + [\begin{array}{c} 2 b \\ b \\ 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ 36 d \end{array}]

解题步骤 1.2

加上相应元素。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b \\ - a + b \\ 8 a + 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ 36 d \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b \\ - a + b \\ 8 a + 7 b \end{array}] + [\begin{array}{c} c \\ 3 c \\ - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ 36 d \end{array}]$

解题步骤 1.3

加上相应元素。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b + c \\ - a + b + 3 c \\ 8 a + 7 b - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ 36 d \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b + c \\ - a + b + 3 c \\ 8 a + 7 b - 4 c \end{array}] + [\begin{array}{c} 3 d \\ - 4 d \\ 36 d \end{array}]$

解题步骤 1.4

加上相应元素。

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b + c + 3 d \\ - a + b + 3 c - 4 d \\ 8 a + 7 b - 4 c + 36 d \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b + c + 3 d \\ - a + b + 3 c - 4 d \\ 8 a + 7 b - 4 c + 36 d \end{array}]$

[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b + c + 3 d \\ - a + b + 3 c - 4 d \\ 8 a + 7 b - 4 c + 36 d \end{array}]

$[\begin{array}{c} 10 \\ - 15 \\ 131 \end{array}] = [\begin{array}{c} a + 2 b + c + 3 d \\ - a + b + 3 c - 4 d \\ 8 a + 7 b - 4 c + 36 d \end{array}]$

解题步骤 2

矩阵方程可表示为一组方程。

10 = a + 2 b + c + 3 d

$10 = a + 2 b + c + 3 d$

- 15 = - a + b + 3 c - 4 d

$- 15 = - a + b + 3 c - 4 d$

131 = 8 a + 7 b - 4 c + 36 d

$131 = 8 a + 7 b - 4 c + 36 d$

线性代数 示例

线性代数示例