If $A$ is inventory matrix and I is unit matrix of same order , then $(I - A) (I + A)$ is

zero matrix

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A

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I

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2 A

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Solution

The correct option is D zero matrix
$A$ is inventory matrix
$∴ A A^{'} = I (I - A) (I + A) = I^{2} - I A + A I - A^{2} = I - A + A - I = 0$
$∴$ zero matarix

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