For any matrix A, the matrix A A' is always a: A. Symmetric matrix B. Skew-symmetric matrix C. Diagonal matrix D. Identity matrix Answer: A) Symmetric matrix Explanation: Let P = A A'. Taking the transpose: P' = (A A')' = (A')' A' = A A' = P. Since P' = P, the product A A' is always symmetric.

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For any matrix A, the matrix A A' is always a:

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For any matrix A, the matrix A A' is always a:

Answer: A) Symmetric matrix

Explanation: Let P = A A'. Taking the transpose: P' = (A A')' = (A')' A' = A A' = P. Since P' = P, the product A A' is always symmetric.