If A= ⎡⎢⎣2−11−12−11−12⎤⎥⎦ Find A−1 and solve f – InterviewSolution

1.	If A= ⎡⎢⎣2−11−12−11−12⎤⎥⎦ Find A−1 and solve following system of linear equations. 2x−y+z=3 −x+2y−z=−4 x−y+2z=1
Answer» If $A$ = $⎡ ⎢ ⎣ \begin{matrix} 2 & - 1 & 1 - 1 & 2 & - 1 1 & - 1 & 2 \end{matrix} ⎤ ⎥ ⎦$ Find $A^{- 1}$ and solve following system of linear equations. $2 x - y + z = 3$ $- x + 2 y - z = - 4$ $x - y + 2 z = 1$

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