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Himpunan [tex]\( A = \{1, 2, 3, 4, 5\} \)[/tex] dan [tex]\( B = \{3, 4, 5, 6, 7\} \)[/tex]. Jumlah elemen dari [tex]\( A \cup B \)[/tex] adalah....

a. 7
b. 8
c. 9
d. 10