0\\\\---(-1)+++(1)---(3)+++\\\\x\in (-1,1)U(3,+\infty)" alt="\frac{1}{x-1}<\frac{2}{x+1}\; ,\; \; ODZ:\; x\ne \pm 1\\\\\frac{1}{x-1}-\frac{2}{x+1}<0\\\\\frac{x+1-2(x-1)}{(x-1)(x+1)}<0\\\\\frac{-x+3}{(x-1)(x+1)}<0\\\\\frac{x-3}{(x-1)(x+1)}>0\\\\---(-1)+++(1)---(3)+++\\\\x\in (-1,1)U(3,+\infty)" align="absmiddle" class="latex-formula">