Practice question

MCQ

Question

If A, B, C are square matrices of the same order, then which of the following is true?

Options

Choose one · Correct answer highlighted

ABC = CBA (AB)² = A²B² AB = 0 ⇒ then always either A = 0 or B = 0 AB = I ⇒ AB = BA Correct

Explanation

Applying the basic concept, using formula we get AB = I ⇒ AB = BA. Calculation gives this directly, check steps: apply rule, substitute values, simplify to get AB = I ⇒ AB = BA.

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