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Himpunan bagian = 2^5 = 32
2. A = {1, 2, 5, 10}
n(A) = 4
Himpunan bagian = 2⁴ = 16
Pola = 1 4 6 4 1
1 = Himpunan kosong dan 4 anggota
4 = 1 anggota dan 3 anggota
6 = 2 anggota
Jadi, jawabannya yang B. = 6 buah