(Choose 1 answer)
(See picture)
A. None of the other choices is correct
B. (ii)
C. (1)
D. (iv)
E. (iii)
Find a recursive definition for the set of all integers not divisible by 3.
(i) 1 ∈ S, if a ∈ S then a+3 € S, a-3 ∈ S
(ii) 1∈ S, if a ∈ S then a+3 S
(iii) 1,2 ∈ S, if a ∈ S then a+3 ES
(iv) 1, 2 ∈ S, if a ∈ S then a+3 € S, a-3 ES
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