Răspunsuri

2014-09-18T00:46:02+03:00
5x≥7-2 => 5x≥5 => x≥1 5x≤17-2 => 5x≤15 => x≤3 1≤x≤3 => x apartine multimii 1,2,3 = A B ={ 1, 2 , 3 , ....., infinit } A reuniut cu B = multimea N stelat / star A intersectat cu B = 1, 2, 3 A-B = multimea vida B-A = 3,4,..... infinit
2 4 2