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scrieti numerele de forma: a)45x b) 27xx

Răspuns :

X apartine mulțimii ( 0,1,2,3,4,5,6 ,7,8,9)
a) 45x -> x apartine multimii { 0,1,2,3,4,5,6,7,8,9} -> 450.451...
b) 27xx -> x apartine multimii { 0.1.2.3.4.5.6.7.8.9 } -> 2700,2711,2722,2733......