b. Determine whether each of these functions from {a, b, c, d} to itself is one-to-one. i. f(a) = b, f(b) = a, f(c) = c, f(d) = d ii. f(a) = b, f(b) = b, f(c) = d, f(d) = c %3D ii. f(a) = d, f(b) = b, f(c) = c, f(d) = d %3D

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Domain

In simple mathematics terms, a domain is defined as the space on which all the possible inputs for the function will lie. It can also be expressed as a set of departures for the required function.