(Choose 1 answer)
(See picture)
A. (iii)
B. (ii)
C. (i)
D. None of the other choices is correct
E. (iv)
Find a recursive definition for the set of all integers divisible by 3.
(i) 3,-3E S, and if a Sthen 3a ∈ S
(ii) 3 S, and if a, b Sthen a-be S
(iii) 3 S, and if a,b Sthen a+b∈ S
(iv) 3 S, and if a Sthen 3a E S
E31
