Question

ajutor la mate.
dau coronita.!​

Answer 1

1 <= x <= a

a <= x <= 6

A intersectat cu B = {4} -> 4 € A , 4 € B

inlocuim:

1 <= 4 <= a

a <= 4 <= 6

deci : 4<= a si a <= 4 -> a € {4}