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Let S be a field, For x and y in S, x and y#0. Prove the following a. (x= x -1 b. (1)x=(x)) =

Let S be a field, For x and y in S, x and y#0. Prove the following a. (x= x -1 (x)) b. (1)x = (-x)) = c. (1)

Let S be a field, For x and y in S, x and y#0. Prove the following a. (x= x -1 b. (1)x=(x)) = (x)) c. (1) = -1

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