Question: MAT102 PROOF Example 2. Let S = 2a + 1 : a, be Z, b / 0). Is S a field under usual addition and

MAT102 PROOF

Example 2. Let S = 2a + 1 : a, be Z, b / 0). Is S a field under usual addition and multiplication? Example 3. Let A = R \\ (2, -2. }, -}}. Is A a field under usual addition and multiplication? 3 Example 4. Using regular addition and multiplication of numbers, which of the following sets is a field? 1. Roz 2. [0, 2) 3. {{Inez} 4. {2m . 5" | n, me Z} 5. QUZ. Example 5. Let f : N x Z - R be the function defined by / (m, n) = 2m + n. 1. Find the domain of f. 2. Find the co-domain of f. 3. Find f(1, 1), f(2,3), f (2, -3), f (1, 0). 4. Find the image of f

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