HCU MCA 2015 Paper

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Question : 34 of 75

Marks: +1, -0

Consider the matrix A =

[\table 5, 4,0; 1, 2,0;1,2,2]

. Then which of the following is true;

A $^{-1}$ doesn’t exist
$\A^{-1}=1/12(\A^2-2\A+20\I)$
$\A^{-1}=\A^2-2\A+20\I$
$\A^{-1}=1/12 \;\A$
None of the Above

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