Lineare Algebra Beispiele

⎡ ⎢ ⎣ \begin{matrix} 3 & - 7 & 5 & 0 6 & - 14 & 10 & 0 12 & - 28 & 20 & 0 \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} 3 & - 7 & 5 & 0 \\ 6 & - 14 & 10 & 0 \\ 12 & - 28 & 20 & 0 \end{array}]$

Schritt 1

Ermittele die normierte Zeilenstufenform.

Tippen, um mehr Schritte zu sehen ...

Schritt 1.1

Multiply each element of

R_{1}

$R_{1}$ by

\frac{1}{3}

$\frac{1}{3}$ to make the entry at

1, 1

$1, 1$ a

1

$1$ .

Tippen, um mehr Schritte zu sehen ...

Schritt 1.1.1

Multiply each element of

R_{1}

$R_{1}$ by

\frac{1}{3}

$\frac{1}{3}$ to make the entry at

1, 1

$1, 1$ a

1

$1$ .

⎡ ⎢ ⎢ ⎣ \begin{matrix} \frac{3}{3} & \frac{- 7}{3} & \frac{5}{3} & \frac{0}{3} 6 & - 14 & 10 & 0 12 & - 28 & 20 & 0 \end{matrix} ⎤ ⎥ ⎥ ⎦

$[\begin{array}{c} \frac{3}{3} & \frac{- 7}{3} & \frac{5}{3} & \frac{0}{3} \\ 6 & - 14 & 10 & 0 \\ 12 & - 28 & 20 & 0 \end{array}]$

Schritt 1.1.2

Vereinfache

R_{1}

$R_{1}$ .

⎡ ⎢ ⎢ ⎣ \begin{matrix} 1 & - \frac{7}{3} & \frac{5}{3} & 0 6 & - 14 & 10 & 0 12 & - 28 & 20 & 0 \end{matrix} ⎤ ⎥ ⎥ ⎦

$[\begin{array}{c} 1 & - \frac{7}{3} & \frac{5}{3} & 0 \\ 6 & - 14 & 10 & 0 \\ 12 & - 28 & 20 & 0 \end{array}]$

⎡ ⎢ ⎢ ⎣ \begin{matrix} 1 & - \frac{7}{3} & \frac{5}{3} & 0 6 & - 14 & 10 & 0 12 & - 28 & 20 & 0 \end{matrix} ⎤ ⎥ ⎥ ⎦

$[\begin{array}{c} 1 & - \frac{7}{3} & \frac{5}{3} & 0 \\ 6 & - 14 & 10 & 0 \\ 12 & - 28 & 20 & 0 \end{array}]$

Schritt 1.2

Perform the row operation

R_{2} = R_{2} - 6 R_{1}

$R_{2} = R_{2} - 6 R_{1}$ to make the entry at

2, 1

$2, 1$ a

0

$0$ .

Tippen, um mehr Schritte zu sehen ...

Schritt 1.2.1

Perform the row operation

R_{2} = R_{2} - 6 R_{1}

$R_{2} = R_{2} - 6 R_{1}$ to make the entry at

2, 1

$2, 1$ a

0

$0$ .

⎡ ⎢ ⎢ ⎢ ⎣ \begin{matrix} 1 & - \frac{7}{3} & \frac{5}{3} & 0 6 - 6 \cdot 1 & - 14 - 6 (- \frac{7}{3}) & 10 - 6 (\frac{5}{3}) & 0 - 6 \cdot 0 12 & - 28 & 20 & 0 \end{matrix} ⎤ ⎥ ⎥ ⎥ ⎦

$[\begin{array}{c} 1 & - \frac{7}{3} & \frac{5}{3} & 0 \\ 6 - 6 \cdot 1 & - 14 - 6 (- \frac{7}{3}) & 10 - 6 (\frac{5}{3}) & 0 - 6 \cdot 0 \\ 12 & - 28 & 20 & 0 \end{array}]$

Schritt 1.2.2

Vereinfache

R_{2}

$R_{2}$ .

⎡ ⎢ ⎢ ⎣ \begin{matrix} 1 & - \frac{7}{3} & \frac{5}{3} & 0 0 & 0 & 0 & 0 12 & - 28 & 20 & 0 \end{matrix} ⎤ ⎥ ⎥ ⎦

$[\begin{array}{c} 1 & - \frac{7}{3} & \frac{5}{3} & 0 \\ 0 & 0 & 0 & 0 \\ 12 & - 28 & 20 & 0 \end{array}]$

Schritt 1.3

Perform the row operation

$R_{3} = R_{3} - 12 R_{1}$ to make the entry at

$3, 1$ a

$0$ .

Tippen, um mehr Schritte zu sehen ...

Schritt 1.3.1

Perform the row operation

$R_{3} = R_{3} - 12 R_{1}$ to make the entry at

$3, 1$ a

$0$ .

$[\begin{array}{c} 1 & - \frac{7}{3} & \frac{5}{3} & 0 \\ 0 & 0 & 0 & 0 \\ 12 - 12 \cdot 1 & - 28 - 12 (- \frac{7}{3}) & 20 - 12 (\frac{5}{3}) & 0 - 12 \cdot 0 \end{array}]$

Schritt 1.3.2

Vereinfache

$R_{3}$ .

$[\begin{array}{c} 1 & - \frac{7}{3} & \frac{5}{3} & 0 \\ 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 \end{array}]$

Schritt 2

The pivot positions are the locations with the leading

$1$ in each row. The pivot columns are the columns that have a pivot position.

Pivot Positions:

$a_{11}$

Pivot Columns:

$1$