AP EAMCET Engineering 2018 Apr 22 Shift 2 Paper

Section: Mathematics

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Question : 4 of 160

Marks: +1, -0

If A is a square matrix of order 3, and A2+A+2I=0 , then

A can not be a skew-symmetric matrix
|A+I|=0
A is non singular and A−1=(A+I)−1
|A||A+I|=2

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