The additive identity for a matrix A of order m × n is:
The additive identity for a matrix A of order m × n is:
- A. Identity matrix of order n
- B. Zero matrix of order m × n
- C. Matrix −A
- D. Scalar 1
Answer: B) Zero matrix of order m × n
Explanation: The zero matrix O of the same order as A acts as the additive identity, since A + O = O + A = A.
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