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fie A={z€N( x+1)€D12
B={x€N|x=2k+1 k€N stelat €A }
aflati A intersectat B si B-A urgent!! va rog !!


Răspuns :

A= {0,1,2,3,5,11}
x+1∈{1,2,3,4,6,12}

B= {1,3,5,11}
A n B={1,3,5,11}
B-A= ∅