Question

Aflati X astfel incat 2x-1 divide 25. X+2 divide x+4. X apartine lui N

Answer 1

2x-1/25 ⇒ 2x-1∈D25⇒ 2x-1∈{1,5,25}⇒2x∈{2,6,26}⇒ x∈{1,3,13}

x+2/x+4
x+2/x+2 (-)⇒ x+2/ x+4-x-2⇒ x+2/2⇒x+2 ∈ D2⇒ x+2∈ {1,2}⇒ x=0