Question

Rezolvati in Z inecuatia  :

1_  +1__ =2____
x       x-1    x+1

Answer 1

1*(x-1) +1*(x+1)=2x
x-1+x+1=2x
2x=2x  Adevarat

Answer 2

$\frac{1}{x} + \frac{1}{x-1} = \frac{2}{x+1}  numitorul comun este x(x+1)(x-1) [tex] \frac{(x+1)(x-1)+x+1}{x(x+1)(x-1)} = \frac{x-1}{x(x+1)(x-1)}$
x+1=0
x= -1