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Which of these matrices is symmetric?
A[[0, 2], [-2, 0]]
B[[1, 2], [3, 1]]
C[[1, 2], [2, 3]]
D[[1, 2], [0, 3]]
Answer & Solution
Correct answer: C. [[1, 2], [2, 3]]
Only [[1, 2], [2, 3]] has equal entries 2 across the diagonal, so it equals its transpose.
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