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Dauuu coroanaa!! Determinati elementele multimii A={x apartine Z/x+4/x+1 apartine Z}.

Răspuns :

x+4/x+1 € Z

x+1 | x+4
x+1 | x+1
=> x+1 | x+4-x-1
x+1 | 3
x+1 € D3
x+1 € {-3, -1, 1, 3} /-1
x € {-4, -2, 0, 2}
A = {-4, -2, 0, 2}