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Adriana
. Seja 𝑈 = {−2; 1; 0; 1 2 ; 3 4 ; 2; 10 3 ; 4; −5}. Explicitar os elementos de cada um dos conjuntos seguintes: a) {𝑥 ∈ 𝑈/𝑥 − 4 < 0} b) {𝑥 ∈ 𝑈/𝑥 2 − 6𝑥 + 8 < 0} c) {𝑥 ∈ 𝑈/4 − 𝑥 ≤ 0} d) {𝑥 ∈ 𝑈/𝑥 2 + 1 ≤ 0}
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