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Anggota Himpunan dan Himpunan Bagian

contoh 1 :











perhatikan bahwa setiap angka yang ada di dalam A adalah anggota dari A, kita lihat 1,2 bukan anggota A, sebab tidak ada anggota 1,2 yang ada hanya 1; 2; 3 dan 4 












{1} kita baca himpunan dengan anggota angka 1 adalah bagian dari A
angka 2 bukan himpunan bagian dari A
{1,2} kita baca himpunan dengan anggota angka 1 dan 2 adalah himpunan bagian dari A

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