Question

Enumerati elementele multimilor, in ordine descrescatoare:
a) A = {x apartine Z |1 < |x| < 5}
b) B= { x apartine Z |2 < |x| < sau egal 6}

Answer 1

a) 1</x/<5=>x apartine {-2, -3, -4, 2, 3, 4}=>A={4,3,2,-2,-3,-4}
b) 2</x/<=6=>x apartine {-3, -4, -5, -6, 3, 4, 5, 6}=>B={6,5,4,3,-3,-4,-5,-6}

Answer 2

a) 1</x/<5=>x ∈ {-2, -3, -4, 2, 3, 4}=>A={4,3,2,-2,-3,-4}