Asked by geeta
Prove that the real numbers with the operation of addition is a group but that the real numbers with the operation multiplication is not a group
Answers
Answered by
Steve
under addition, each element x has an inverse such that x + x^-1 = 0 (the additive identity)
under multiplication each element has an inverse such that x * x^-1 = 1, except zero.
both operations are associative and commutative, which fill out the necessary conditions.
under multiplication each element has an inverse such that x * x^-1 = 1, except zero.
both operations are associative and commutative, which fill out the necessary conditions.
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