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JEE Mathematics · Easy

Matrices and Determinants: Identity matrix MCQ

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Identity matrixEasyQuestion 250004

Question

If A is any square matrix, then AI equals:
  1. A
    A
    Correct
  2. B
    I
  3. C
    0
  4. D
    Aᵀ

Correct answer

A

Explanation

The identity matrix I is the multiplicative identity: AI = IA = A for any compatible matrix A.

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