Question

daca x apartine Z si -5/x+1 apartine Z, atunci x apartine multimii:
a) {-6; -2; 2; 4}
b) {-6; -2; 0; 4}
c) {-2; -2; 0; 4}
d) {-6; 0; 2; 4}

Answer 1

Răspuns:

x+1∈Z =>x+1= divizorii lui 5

D₅={1,5,-1,-5} I -1

x={0,4,-2,-6}

raspuns b