Question

Determinaţi mulţimile: A = {x | x € N şi x e D15} C={x € D10 si x + 2 € D12};

Answer 1

Răspuns:

x € D15 => x € {1,3,5,15}

A={1,3,5,15}

x € D10 => x € {1,2,5,10} (1)

x+2 € D12 => x+2 € {1,2,3,4,6,12} => x € {-1,0,1,2,4,10} (2)

(1)+(2) => x € {1,2,10}

C={1,2,10}