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On all (2\times 2) real matrices, (A RB) if and only if (\operatorname{tr}(A)=\operatorname{tr}(B)). Why is this an equivalence relation?

Answer and explanation

Correct answer: Because equality of trace is reflexive, symmetric, and transitive

Step 1: The trace of a matrix is equal to its own trace. Step 2: Equality of trace works in both directions. Step 3: If the traces are equal pairwise through a middle matrix, then the first and third traces are also equal.

Related tags

MatricesTraceEquivalence RelationClass 12Relations And FunctionsMathematicsClass 12 Mcq

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