Answer:
26. {c,d}: {c}, {d}, {c,d}
27. {1, 2, 3, 4, 5}: {1}, {2}, {3}, {4}, {5}, {1,2}, {1,3}, {1,4}, {1,5}, {2,3}, {2,4}, {2,5}, {3,4}, {3,5}, {4,5}, {1,2,3}, {1,2,4}, {1,2,5}, {1,3,4}, {1,3,5}, {1,4,5}, {2,3,4}, {2,3,5}, {2,4,5}, {3,4,5}, {1,2,3,4}, {1,2,3,5}, {1,2,4,5}, {1,3,4,5}, {2,3,4,5}, {1,2,3,4,5}
28. {m, a, t, h}: {m}, {a}, {t}, {h}, {m,a}, {m,t}, {m,h}, {a,t}, {a,h}, {t,h}, {m,a,t}, {m,a,h}, {m,t,h}, {a,t,h}, {m,a,t,h}
29. {7,5,3}: {7}, {5}, {3}, {7,5}, {7,3}, {5,3}, {7,5,3}
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Answers & Comments
Answer:
26. {c,d}: {c}, {d}, {c,d}
27. {1, 2, 3, 4, 5}: {1}, {2}, {3}, {4}, {5}, {1,2}, {1,3}, {1,4}, {1,5}, {2,3}, {2,4}, {2,5}, {3,4}, {3,5}, {4,5}, {1,2,3}, {1,2,4}, {1,2,5}, {1,3,4}, {1,3,5}, {1,4,5}, {2,3,4}, {2,3,5}, {2,4,5}, {3,4,5}, {1,2,3,4}, {1,2,3,5}, {1,2,4,5}, {1,3,4,5}, {2,3,4,5}, {1,2,3,4,5}
28. {m, a, t, h}: {m}, {a}, {t}, {h}, {m,a}, {m,t}, {m,h}, {a,t}, {a,h}, {t,h}, {m,a,t}, {m,a,h}, {m,t,h}, {a,t,h}, {m,a,t,h}
29. {7,5,3}: {7}, {5}, {3}, {7,5}, {7,3}, {5,3}, {7,5,3}