а) х∈[-2;-1] ⋃ (-1;1) ⋃ (1;+∞)
б) х∈(-∞;-3) ⋃ [1/7; 1] ⋃ (3; +∞)
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а) х∈[-2;-1] ⋃ (-1;1) ⋃ (1;+∞)
б) х∈(-∞;-3) ⋃ [1/7; 1] ⋃ (3; +∞)