Question

x apartine Z,astfel incat 3x-2/x+1 apartine Z=>x apartine {...............} plizzzzzzzzz raspundeti va rog mult dau coroana ,multumiri si stelute

Answer 1

(3x+3-3-2)/(x+1)=3(x+1)/(x+1) -5/(x+1)=3-5/(x+1)
trebuie dscutata situatia 5/(x+1) asa incat x+1 sa ie divizorul lui 5
D5={-5,-1,1,5}
x+1=-5⇒x=-6
x+1=-1⇒x=-2
x+1=1⇒x=0
x+1=5⇒x=4
S={-6,-2,0,4}