Ответ:
(x∈-∞,1)
0} \atop {x-1" alt="\left \{ {{log_2(1-x)>0} \atop {x-1" align="absmiddle" class="latex-formula">0} \atop {x-1=0}} \right." alt="\left \{ {{log_2(1-x)>0} \atop {x-1=0}} \right." align="absmiddle" class="latex-formula">
0} \atop {x>1}} \right." alt="\left \{ {{x>0} \atop {x>1}} \right." align="absmiddle" class="latex-formula">
x∈(-∞,0)
x<0</p>