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JEE Main Mock Test Series 2020 & Previous Year Papers

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 Notes | EduRev
 Notes | EduRev

 Notes | EduRev

Illustration 3: If A and B are square matrices of equal degree, then which of the following is correct? (1995)
1. A+B = B+A
2. A+B = A-B
3. A-B = B-A
4. AB = BA
Solution:Since A and B are square matrices and are also of equal degree so the addition must be commutative.
Hence, we must have A+B = B+A.

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