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Study Stuff for MCA Examinations - NIMCET
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If $x, y, z$ are all different from zero and
$\begin{vmatrix}
1 + x & 1 & 1 \\
1 & 1 + y & 1 \\
1 & 1 & 1 + z
\end{vmatrix} = 0$,
then the value of $x^{-1} + y^{-1} + z^{-1}$ is:
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