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CBSE Class 12 Math 2019 Delhi Set 1 Solved Paper

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Question : 24 of 29
Marks: +1, -0
x+y+z=6,x+2z=7,3x+y+z=12x+y+z=6, x+2z=7, 3x+y+z=12
OR
Find the inverse of the following matrix using elementary operations.
A=[12−2−1300−21]A = \begin{bmatrix} 1 & 2 & -2 \\ -1 & 3 & 0 \\ 0 & -2 & 1 \end{bmatrix}
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