aflati multimea x, stiind ca sunt indeplinite simultan conditiile :a) XU{1;2;3}={1;2;3;4}b)Xn{1;2;3}={1;2}

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30 Agustus 2025 matematica 5 minute
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Clasă: Education Materie: matematica
aflati multimea x, stiind ca sunt indeplinite simultan conditiile :a) XU{1;2;3}={1;2;3;4}b)Xn{1;2;3}={1;2}
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Din X ∩ {1;2;3}={1;2}  =>  {1;2}∈X si {1;2}∈{1;2;3} ,
din  X ∪ {1;2;3}={1;2;3;4} => 4 ∈ X .
Inseamna ca:  X = {1;2;4} . 
                       

Răspunsul a fost dat în data 30 Agustus 2025

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