JAMB Mathematics 2023 Paper

Concept:Commutativity means the order of two operands does not affect the result of the binary operation.Explanation:For a binary operation $*$ defined on a set $A$, it is commutative if and only if $a * b = b * a$ for all $a, b \in A$.This matches option A exactly.Option B, $(a * b) * c = a * (b * c)$, defines associativity.Option C, $(b \circ c) * a = (b * a) \circ (c * a)$, defines distributivity of $*$ over $\circ$.Only option A gives the correct condition for commutativity.Answer:A. $a * b = b * a$