RREF dari $$$\left[\begin{array}{cccc}- \sqrt{6} & 0 & 1 & 0\\0 & - \sqrt{6} & 1 & 0\\1 & 1 & - \sqrt{6} & 2\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Tentukan bentuk eselon baris tereduksi dari $$$\left[\begin{array}{cccc}- \sqrt{6} & 0 & 1 & 0\\0 & - \sqrt{6} & 1 & 0\\1 & 1 & - \sqrt{6} & 2\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$.

Bagi baris $$$1$$$ dengan $$$- \sqrt{6}$$$: $$$R_{1} = - \frac{\sqrt{6}}{6} R_{1}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & - \frac{\sqrt{6}}{6} & 0\\0 & - \sqrt{6} & 1 & 0\\1 & 1 & - \sqrt{6} & 2\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Kurangi baris $$$1$$$ dari baris $$$3$$$: $$$R_{3} = R_{3} - R_{1}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & - \frac{\sqrt{6}}{6} & 0\\0 & - \sqrt{6} & 1 & 0\\0 & 1 & - \frac{5 \sqrt{6}}{6} & 2\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Bagi baris $$$2$$$ dengan $$$- \sqrt{6}$$$: $$$R_{2} = - \frac{\sqrt{6}}{6} R_{2}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & - \frac{\sqrt{6}}{6} & 0\\0 & 1 & - \frac{\sqrt{6}}{6} & 0\\0 & 1 & - \frac{5 \sqrt{6}}{6} & 2\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Kurangi baris $$$2$$$ dari baris $$$3$$$: $$$R_{3} = R_{3} - R_{2}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & - \frac{\sqrt{6}}{6} & 0\\0 & 1 & - \frac{\sqrt{6}}{6} & 0\\0 & 0 & - \frac{2 \sqrt{6}}{3} & 2\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Kalikan baris $$$3$$$ dengan $$$- \frac{\sqrt{6}}{4}$$$: $$$R_{3} = - \frac{\sqrt{6}}{4} R_{3}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & - \frac{\sqrt{6}}{6} & 0\\0 & 1 & - \frac{\sqrt{6}}{6} & 0\\0 & 0 & 1 & - \frac{\sqrt{6}}{2}\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Tambahkan $$$\frac{\sqrt{6}}{6}$$$ kali baris $$$3$$$ ke baris $$$1$$$: $$$R_{1} = R_{1} + \frac{\sqrt{6}}{6} R_{3}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & 0 & - \frac{1}{2}\\0 & 1 & - \frac{\sqrt{6}}{6} & 0\\0 & 0 & 1 & - \frac{\sqrt{6}}{2}\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Tambahkan $$$\frac{\sqrt{6}}{6}$$$ kali baris $$$3$$$ ke baris $$$2$$$: $$$R_{2} = R_{2} + \frac{\sqrt{6}}{6} R_{3}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & 0 & - \frac{1}{2}\\0 & 1 & 0 & - \frac{1}{2}\\0 & 0 & 1 & - \frac{\sqrt{6}}{2}\\0 & 0 & 2 & - \sqrt{6}\end{array}\right]$$$

Kurangkan baris $$$3$$$ yang dikalikan dengan $$$2$$$ dari baris $$$4$$$: $$$R_{4} = R_{4} - 2 R_{3}$$$.

$$$\left[\begin{array}{cccc}1 & 0 & 0 & - \frac{1}{2}\\0 & 1 & 0 & - \frac{1}{2}\\0 & 0 & 1 & - \frac{\sqrt{6}}{2}\\0 & 0 & 0 & 0\end{array}\right]$$$

Karena elemen pada baris $$$4$$$ dan kolom $$$4$$$ (elemen pivot) bernilai $$$0$$$, kita perlu menukar baris.

Temukan elemen tak nol pertama di kolom $$$4$$$ di bawah entri pivot.

Seperti yang dapat dilihat, tidak ada entri semacam itu.

Bentuk eselon baris tereduksi adalah $$$\left[\begin{array}{cccc}1 & 0 & 0 & - \frac{1}{2}\\0 & 1 & 0 & - \frac{1}{2}\\0 & 0 & 1 & - \frac{\sqrt{6}}{2}\\0 & 0 & 0 & 0\end{array}\right]\approx \left[\begin{array}{cccc}1 & 0 & 0 & -0.5\\0 & 1 & 0 & -0.5\\0 & 0 & 1 & -1.224744871391589\\0 & 0 & 0 & 0\end{array}\right].$$$A