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    Set Operations : Commutativity, Unity, Zero Divisors

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    Consider the set R={0,2,4,6,8} C Z10.
    a) Construct addition and multiplication tables for R, using the operations in Z10.

    b) Is R a commutative ring? Does it have unity and, if so, which element is unity?

    c) Does R have zero divisors?

    d) Which elements of R have multiplicative inverses?

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    https://brainmass.com/math/basic-algebra/set-operations-commutativity-unity-zero-divisors-39432

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    Commutativity, Unity, Zero Divisors and Multiplicative Inverses are investigated.

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