Mathematics · Matrices and Determinants
If A is an identity matrix of order 3, then what is 23A3 - 19A2 - 4A equal to?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Scalar matrix with diagonal elements equal to 7
- 2Scalar matrix with diagonal elements equal to 2
- 3Identity matrix of order 3
- 4Null matrix of order 3✓
Correct answer
Null matrix of order 3
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