Question

Fie A={3,5,6,7}, B={4,5,7,8} si C={7,8,9}. Calculati a) card A= b) AUB, c) AUB; d)(B\A)UC DAR LA C SI D U ESTE INVERS

Answer 1

a) card A = 4 b){3,4,5,6,7,8} c) {5,7} d) {8}