ОДЗ:
= 0" alt=" \frac{x+1}{x-1} >= 0" align="absmiddle" class="latex-formula">
и
= 0 " alt=" (x + 1)(x - 1) >= 0 " align="absmiddle" class="latex-formula">
Ответ:
x \in (-\infty; -1] \cup (1; \infty) " alt="
x \in (-\infty; -1] \cup (1; \infty) " align="absmiddle" class="latex-formula">