Question

x apartine Z astefel incat 6/2x+1 x apartine Z

Answer 1

Salut
6/2x+1 E Z
=> 2x+1 E D6={-6,-3,-2,-1,1,2,3,6}
2x+1=-6 x=-7/2  dar x E Z
2x+1=-3 x=-2
2x+1=-2  x=-3/2 dar x E Z
2x+1=-1 x=-1
2x+1=1 x=0
2x+1=2  x=1/2 dar x E Z
2x+1=3  x=1
2x+1=6 x=5/2 dar x E Z
=> x E {-2,-1,0,1}