Question

Daca (2x+3)|6si x€Z atunci x € .........

Answer 1

2x+3 apartine D6

D6 = {-6,-3,-2,-1,1,2,3,6}

2x+3 = -6 => x=-9/2 nu apartine Z

2x+3 = -3 => x=-3  apartine Z

2x+3 = -2 => x=-5/2 nu apartine Z

2x+3 = -1 => x=-2  apartine Z

2x+3 = 1 => x=-1 nu apartine Z

2x+3 = 2 => x=-1/2 nu apartine Z

2x+3 = 3 => x=0 apartine Z

2x+3 = 6 => x=3/2 nu apartine Z