KEAM 2013 Math Paper

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Question : 34 of 120

Marks: +1, -0

If .4 is a square matrix of order 3 such that A2+A+4I=0, where 0 is the zero matrix and I is the unit matrix of order 3, then

A is singular and A+I is non-singular
A is non-singular and A+I is non-singular
A is non-singular and A+I is singular
A is singular and A+I is singular
A is non-singular and A−I is singular

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