Question

aflati elementele urmatoarelor multimi A=(x| x apartine lui N ,x+1|18}

Answer 1

x+1 | 18 rezulta x+1 € D18
x+1 € {1,2,3,6,9,18}
x € {0,1,2,5,8,17}
A = {0,1,2,5,8,17}