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Question

If A2A+I=0, then inverse of A is


A
A2
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B
A+I
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C
IA
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D
AI
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Solution

The correct option is A IA
A2A+I=0

Multiplying=A1(0)

A1(A2A=I)=A1(0)

AI+A1=0

A1=(AI)

A1=IA.

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