Question

calculati cardD12,cardD18,cardD7,card D30

Answer 1

D12=(1, 2, 3, 4, 6, 12)
cardD12=6

D18=(1, 2, 3, 6, 9, 18)
cardD18=6

D7=(1, 7)
cardD7=2

D30=(1, 2, 3, 5, 6, 10, 15, 30)
cardD30=8

card=nr. de elemente dintr-o multime

Answer 2

D(a) = multimea divizorilor lui a.
D(12) = {1, 2, 3, 4, 6, 12}, deci card D(12) = 6
D(18) = {1, 2, 3, 6, 9, 18}, deci card D(18) = 6
D(7) = {1, 7}, deci card D(7) = 2
D(30) = {1, 2, 3, 5, 6, 10,15, 30}, deci card D(30) = 8.