Răspunsuri

2014-08-21T12:54:54+03:00
 \frac{11}{2x-1}  ∈ z

2X-1 este divizibil cu 11
divizorii lui 1 sunt 1 si 11

2x-1=11
2x=12
x=6

2x-1=1
2x=2
x=1

2x-1=-11
2x=-10
x=5

2x-1=-1
2x=0
x=0

S{0,1,5,6}
2014-08-21T12:58:42+03:00
11/(2x-1) ∈ Z
x∈ Z                          =>(2x-1)|11    =>2x-1={-1,1,-11,11}

1) 2x-1= -1  <=> 2x = 0  =>x=0

2) 2x-1= 1  <=> 2x= 2 =>x=1

3) 2x-1= -11 <=> 2x= -10 => x= -5

4) 2x-1 = 11 <=> 2x= 12 => x=6
1 5 1