Question

dados os conjuntos A={0,1,2,3} B={0,2,3,5} C={0,2,4,6,8} D={5,7,9}. Determine
a- (A-B)-C
b- (B-C)-D
c- (A-C)-D
d- (B-D)-A

Answer 1

a) {1}-{0,2,4,6,8}= (A-B)-C={1}
b) {3,5}-{5,7,9}=    (B-C)-D={3}
c) {1,3)-{5,7,9}=    (A-C)-D={1,3}
d) {0,2,3}-{0,1,2,3}=     (B-D)-A={Ф}, ou seja, é nulo.
Espero ter ajudado.