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Question
\[
\left.\left\lvert\, \begin{array}{lll}
\sigma_{x}-\sigma_{p} & I_{x y} & I_{x x} \\
T_{x y} & \sigma_{y}-\sigma^{\prime} p & I_{y} \\
I_{z x} & I_{y z} & \left(\sigma_{z}\right.
\end{array}\right.\right)=0
\]
Find the determinat of this