$$$\left[\begin{array}{ccc}3 & -4 & 2\\1 & 6 & 8\\2 & 7 & 9\end{array}\right]$$$:n vähennetty riviporrasmuoto

Löydä matriisin $$$\left[\begin{array}{ccc}3 & -4 & 2\\1 & 6 & 8\\2 & 7 & 9\end{array}\right]$$$ redusoitu rivi-porrasmuoto.

Jaa rivi $$$1$$$ luvulla $$$3$$$: $$$R_{1} = \frac{R_{1}}{3}$$$.

$$$\left[\begin{array}{ccc}1 & - \frac{4}{3} & \frac{2}{3}\\1 & 6 & 8\\2 & 7 & 9\end{array}\right]$$$

Vähennä rivi $$$1$$$ rivistä $$$2$$$: $$$R_{2} = R_{2} - R_{1}$$$.

$$$\left[\begin{array}{ccc}1 & - \frac{4}{3} & \frac{2}{3}\\0 & \frac{22}{3} & \frac{22}{3}\\2 & 7 & 9\end{array}\right]$$$

Vähennä rivistä $$$3$$$ $$$2$$$ kertaa rivi $$$1$$$: $$$R_{3} = R_{3} - 2 R_{1}$$$.

$$$\left[\begin{array}{ccc}1 & - \frac{4}{3} & \frac{2}{3}\\0 & \frac{22}{3} & \frac{22}{3}\\0 & \frac{29}{3} & \frac{23}{3}\end{array}\right]$$$

Kerro rivi $$$2$$$ luvulla $$$\frac{3}{22}$$$: $$$R_{2} = \frac{3 R_{2}}{22}$$$.

$$$\left[\begin{array}{ccc}1 & - \frac{4}{3} & \frac{2}{3}\\0 & 1 & 1\\0 & \frac{29}{3} & \frac{23}{3}\end{array}\right]$$$

Lisää rivi $$$2$$$ kerrottuna luvulla $$$\frac{4}{3}$$$ riviin $$$1$$$: $$$R_{1} = R_{1} + \frac{4 R_{2}}{3}$$$.

$$$\left[\begin{array}{ccc}1 & 0 & 2\\0 & 1 & 1\\0 & \frac{29}{3} & \frac{23}{3}\end{array}\right]$$$

Vähennä rivistä $$$3$$$ $$$\frac{29}{3}$$$ kertaa rivi $$$2$$$: $$$R_{3} = R_{3} - \frac{29 R_{2}}{3}$$$.

$$$\left[\begin{array}{ccc}1 & 0 & 2\\0 & 1 & 1\\0 & 0 & -2\end{array}\right]$$$

Jaa rivi $$$3$$$ luvulla $$$-2$$$: $$$R_{3} = - \frac{R_{3}}{2}$$$.

$$$\left[\begin{array}{ccc}1 & 0 & 2\\0 & 1 & 1\\0 & 0 & 1\end{array}\right]$$$

Vähennä rivistä $$$1$$$ $$$2$$$ kertaa rivi $$$3$$$: $$$R_{1} = R_{1} - 2 R_{3}$$$.

$$$\left[\begin{array}{ccc}1 & 0 & 0\\0 & 1 & 1\\0 & 0 & 1\end{array}\right]$$$

Vähennä rivi $$$3$$$ rivistä $$$2$$$: $$$R_{2} = R_{2} - R_{3}$$$.

$$$\left[\begin{array}{ccc}1 & 0 & 0\\0 & 1 & 0\\0 & 0 & 1\end{array}\right]$$$

Redusoitu porrasmuoto on $$$\left[\begin{array}{ccc}1 & 0 & 0\\0 & 1 & 0\\0 & 0 & 1\end{array}\right]$$$A.