Răspuns:
Explicație pas cu pas:
Cardinalul unei multimi este numarul elementelor multimii.
a)
Card A = 6
_________
b)
B = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
Card B = 20
__________
c)
C = {1, 2, 3, 4, 6, 8, 12, 24}
Card C = 8
____________
d)
D = {0, 2, 4, 6, 8, 10, 12, 14]
Card D = 8
_____________
e)
12*2 + 3n ≤ 291
24 + 3n ≤ 291
3n ≤ 291 - 24
3n ≤ 267
n ≤ 267 : 3
n ≤ 89
E = {0, 1, 2, 3, ....., 89}
Card E = 90
