Răspuns :
X+3|7
D(7)={-7,-1,1,7}
1. X+3=-7
X=-7-3=-10
2. X+3=-1
X=-1-3=-4
3. X+3=1
X=1-3=-2
4. X+3=7
X=7-3=4
[tex] \frac{7}{x+3} [/tex] de unde x+3 E [tex] D_{7} [/tex]
xE{-4,-2,-3,4,-10}
xE{-4,-2,-3,4,-10}