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a fost răspuns

Determinati a U b , a n b , a - b si b-a , specificand cardinalul lor:
a) A={ 10,20,30,40 }; B={ 2x3,3x10,2x10,2x40}
b) A={n∈ N / n ≤7}; B={n∈ N*/ n este cifra para} VA ROG :(

Răspuns :

Bibi2132
a) B={6;30;20;80} ->cardB=4
A U B = {10;20;30;40;6;80} ->card A U B=6
A n B = {20;30} -> card A n B =2
A/B = {10;40} -> card A/B=2
B/A = {6;80} -> card B/A=2
b) A={0,1,2,3,4,5,6,7}
B={2,4,6,8}
A U B= {0,1,2,3,4,5,6,7,8} card A U B=9
A n B={ 2,4,6} card A n B=3
A/B= {0,1,3,5,7} card A/B=5
B/A={8} card B/A=1

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