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प्रश्न
Which equation expresses that the identity matrix acts as a multiplicative identity?
पर्याय
\[AI = IA = I\]
\[A + I = I\]
\[AI = IA = A\]
\[AI = IA = O\]
MCQ
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उत्तर
The identity matrix leaves a matrix unchanged under multiplication. With identity matrices of compatible orders, \[AI = IA = A\].
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