\(\begin{bmatrix}1 & 2 & 3\\ 2 & 8 & 22\\ 3 & 22 & 82\end{bmatrix}\).
\(\begin{bmatrix}1 & 2 & 0\\ 2 & 1 & 0\\ 0 & 0 & -1\end{bmatrix}\).
$$∫\frac{{1}}{{1+x}} $$ from 0 to 2.
Using Gauss jordan method solve the given system of equation
6x1 – 2x2 + x3 = 11
x1 + 2x2 – 5x3 = -1
-2x1 + 7x2 + 2x3 = 5
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