4.tentukan semua himpunan bagian dari k={p,q,r,s,t} a.dua anggota b. tiga anggota c. empat anggota 5.tentukan semua himpunan bagian dari Y={bilangan prima lebih

4.
segitiga Pascal
.................... 1
................. 1 ... 1
............... 1 .. 2 .. 1
............ 1 .. 3 .. 3 .. 1
......... 1 .. 4 .. 6 .. 4 .. 1
...... 1 .. 5 . 10 . 10 ..5 .. 1
1 = 0 anggota
5 = 1 anggota
10 = 2 anggota
10 = 3 anggota
5 = 4 anggota
1 = 5 anggota
a) 2 anggota ada 10 = {p, q}, {p, r}, {p, s}, {p, t}, {q, r}, {q, s}, {q, t}, {r, s}, {r, t}, {s, t}

b) 3 anggota ada 10 = {p, q, r}, {p, q, s}, {p, q, t}, {p, r, s}, {p, r, t}, {p, s, t}, {q, r, s}, {q, r, t}, {q, s, t}, {r, s, t}

c) 4 anggota ada 5 = {p, q, r, s}, {p, q, r, t},
{p, q, s, t}, {p, r, s, t}, {q, r, s, t}
 5.
Y = {7, 11, 13, 17, 19, 23}

a) = {{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) = {{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}}

c) = {{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}}