Răspuns:
Explicație pas cu pas:
A = {1 ; 2 ; 4} ; B = {2 , 3 , 5}
a) C = {a/b I a ∈A ; b ∈B ; a/b < 1}
a/b = 1/2 ; 1/3 ; 1/5 ; 2/2 ; 2/3 ; 2/5 ; 4/2 ; 4/3 ; 4/5
a/b < 1 => C = {1/2 ; 1/3 ; 1/5 ; 2/3 ; 2/5 ; 4/5}
b) D = {a/b I a ∈A ; b ∈B ; a/b = 1} => D = {2/2}
c) E = {a/b I a ∈A ; b ∈B ; a/b > 1} => E = {4/2 ; 4/3}
