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Scrieti toate submultimile multimilor:
a) {1,2}
b) {2,3,5}
c) {a,b,c}


Răspuns :

a){1},{2},{1,2},Ф
b){2},{3},{5},{2,3},{3,5},{2,5},{2,3,5},Ф
c){a,b,c}={a},{b},{c},{a,b},{a,c},{b,c},{a,b,c},Ф