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Posted: **Wed May 11, 2022 10:00 pm**

: 4 Consider The Following Set Of Rational Mumbers R A Z And K 2 With The Usual Addition And Multiplication Of F 1 (9.01 KiB) Viewed 25 times

(4) Consider the following set of rational mumbers: R= { a € Z and k €2} with the usual addition and multiplication of fractions. (a) Prove that is a commutative ring. (b) Prove that 25 is a unit in R. (c) Prove that the group of units in R is {54:€ Z},