Question: a. Let k: Q R be given by k(x) = x 2 - x = 7. Find k -1 ({3}). b. Now consider the same

a. Let k: Q R be given by k(x) = x2 - x = 7. Find k-1 ({3}).

b. Now consider the same function, but with the domain being R. Find Find k-1 ({3}).

c. Let f: {0, 1, 2,} x {0, 1, 2, 3} Z, given by f((a,b)) = a+b. Find f-1 ({3}).

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