Mathematics · Matrices
If A = [aij] is an identity matrix, then which of the following is true?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1aij = 0 if i = j, and aij = 1 if i ≠ j
- 2aij = 1 for all i, j
- 3aij = 0 for all i, j
- 4aij = 0 if i ≠ j, and aij = 1 if i = j✓
Correct answer
aij = 0 if i ≠ j, and aij = 1 if i = j
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