If | array ccc x & 3 & 6 3 & 6 & x 6 & x & 3 array | = | array ccc 2 & x & 7 x & 7 & 2 7…
Mathematics · JEE Advanced · NTA Exams — Matrices and Determinants
If \[\left|\begin{array}{ccc}
x & 3 & 6 \\
3 & 6 & x \\
6 & x & 3
\end{array}\right|\]= \[\left|\begin{array}{ccc}
2 & \mathrm{x} & 7 \\
\mathrm{x} & 7 & 2 \\
7 & 2 & \mathrm{x}
\end{array}\right|\]=\[\left|\begin{array}{ccc}
4 & 5 & x \\
5 & x & 4 \\
x & 4 & 5
\end{array}\right|\]= 0 then x is equal to
- 9
- –9
- 0
- None of these
Answer
(B) –9
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