If A and B are 3 x 3 matrices such that AB = B and BA = A, then :

Mathematics · JEE Main · NTA Exams — Matrices and Determinants

1. A² = A and B² ≠ B
2. A² ≠ A and B² = B
3. A² = A and B² = B
4. A² ≠ A and B² ≠ B

Answer

(C) A 2 = A and B 2 = B

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