A={-3;-1;2}, B=〈-3;2〉, , B=(-3;1), D=〈-1;2〉, , A=〈-4;5〉, C=〈-4;5), , A=(-2;6〉, B=〈-2;6), Určete sjednocení intervalů, 〈-15;4〉, 〈-4;1), (-15;4), (-4;1〉, Určete průnik intervalů, 〈-5;-6〉, 〈-2;0), (-5;6), (-2;0〉, Urči sjednocení intervalů, 〈-7;∾), 〈-1;1), (-1;1〉, (-7;∾), Urči průnik intervalů, 〈-2;7〉, (0;1〉, 〈-2;4), (0;4), Na obrázku je interval, (-∾;-2〉, 〈-∾;-2〉, 〈-∾;-2), (∾;-2), Který z intervalů je zapsán správně, (-2;-5), (-∾;-2〉, 〈-∾;-2〉, (∾;-2〉, Které číslo patří do intervalu, -4, -2, 2, 3, Které číslo patří do A ∪ B, ale NEpatří do A ∩ B, -5, 0, 5, 10.
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