Kunci Jawaban Matematika Kelas 7 Halaman 144 Himpunan dan Pembahasan Ayo Berlatih 2.5

4. Tentukan semua himpunan bagian dari K ={p, q, r, s, t}yang memiliki
a. Dua anggota
b. Tiga anggota
c. Empat anggota

Penyelesaian :

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a) Dua anggota: {p, q}, {p, r}, {p, s}, {p, t}, {q, r}, {q, s}, {q, t}, {r, s}, {r, t}, {s, t}.
b) Tiga anggota: {p, q, r}, {p, q, s}, {p, q, t}, {p, r, s}, {p, r, t}, {p, s, t}, {q, r, s}, {q, r, t}, {r, s, t}.
c) Empat anggota: {p, q, r, s}, {p, q, r, t}, {p, q, s, t}, {p, r, s, t}, {q, r, s, t}.

5. Tentukan semua himpunan bagian dari Y ={bilangan prima lebih dari 6 dan kurang dari 25 } yang memiliki
a. Dua anggota
b. Tiga anggota
c. Empat anggota

Pemyelesaian : Y = {7, 11, 13, 17, 19, 23}

a) Dua anggota : {7, 11}, {7,13}, {7,17}, {7, 19}, {7,23}, {11,13}, {11, 17}, {11, 19}, {11, 23}, {13, 17}, {13, 19}, {13, 23}, {17, 19}, {17, 23}, {19, 23}

b) Tiga anggota : {7, 11, 13}, {7, 11, 17}, {7, 11, 19}, {7, 11, 23}, {7, 13, 17}, {7,13, 19}, {7, 13, 23}, {7, 17, 19}, {7, 17, 23}, {7, 19, 23}, {11, 13, 17}, {11, 13, 19}, {11, 13, 23}, {11, 17, 19,}, {11, 17, 23}, {11, 19, 23}, {13, 17, 19}, {13, 17, 23}, {13, 19, 23}, {17, 19, 23}

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c) Empat anggota : {7, 11, 13, 17}, {7, 11, 13, 19,}, {7, 11, 13, 23}, {7, 11, 17, 19}, {7, 11, 17, 23}, {7, 11, 19, 23}, {7, 17, 19, 23}, {7, 13, 17, 19}, {7, 13, 17, 23}, {7, 17, 19, 23}, {11, 13, 17, 19}, {11, 13, 17, 23}, {11, 13, 19, 23}, {11, 17, 19, 23}, {13, 17, 19, 23}

Itulah pembahasan materi Matematika kelas 7 halaman 144 Himpunan Ayo Kita berlatih 2.5.