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Question
How is an identity matrix denoted when its order is \[n\]?
Options
\[k_n\]
\[A_n\]
\[I_n\]
\[O_n\]
MCQ
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Solution
An identity matrix of order \[n\] is denoted by \[I_n\]. It may also be denoted simply by \[I\] when the order is understood.
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