The root of the equation [ array lll x & 1 & 2 array ] [ array ccc 0 & 1 & 1 1 & 0 & 1 1…
Mathematics · JEE Main · NTA Exams — Matrices and Determinants
The root of the equation \[\left[\begin{array}{lll}
x & 1 & 2
\end{array}\right]\left[\begin{array}{ccc}
0 & 1 & 1 \\
1 & 0 & 1 \\
1 & 1 & 0
\end{array}\right]\left[\begin{array}{c}
x \\
-1 \\
1
\end{array}\right]=\mathrm{O} \text { is }\]
- 1/3
- -1/3
- 0
- 1
Answer
(A) 1/3
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