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Which matrix of a relation on a three-element set makes the relation reflexive?

Answer and explanation

Correct answer: (\begin{bmatrix}1&0&0\1&1&0\0&1&1\end{bmatrix})

Step 1: For reflexivity in a matrix, all main diagonal entries must be (1). Step 2: Only the fourth matrix has diagonal entries (1,1,1). Step 3: Other entries do not affect the decision of reflexivity.

Related tags

RelationsFunctionsReflexive RelationMatrixHardReflexive RelationRelations And FunctionsMathematics

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