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In: Advanced Math

For an integer k, define f(k) = gcd(11k + 1, 7k + 3). (a) Compute R...

For an integer k, define f(k) = gcd(11k + 1, 7k + 3).
(a) Compute R = {f(k): k ∈ Z}.
(b) For each n ∈ R, find a set Dn such that, for every integer k, f(k) = n if and only if k ∈ Dn.

Is there any solution without using the 'mod' for b?

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