Question

determinati elementele multimii c={x apartine lui n/4 supra x+2 apartine lui n},d={x/x cifra para}

Answer 1

C={x∈N| 4 /(x+2) ∈ N},   D={x|x cifra para}
4/(x+2)∈N => x+2|4, deci x+2={2,4} ; x={0,2}
C={0,2}
D={0,2,4,6,8}