Ответы на вопрос:
2/x+1-1/x-1< 1, x≠-1; x≠1 2/x+1-1/x-1-1< 0 2(x-+1)*(x-1)/(x+1)*(x-1)< 0 2x-2-x-1-(x²-1)/(x+1)*(x-1)< 0 2x-2-x-1-x²+1/(x+1)*(x-1)< 0 x-2-x²(x+1)*(x-1)< 0 {x-2-x²< 0 {(x+1)*(x-1)> 0 {x-2-x²> 0 {(x+1)*(x-1)< 0 }x∈r }x∈[-∞, -1] ∪ [1, +∞] }x∈∅ x∈[-1, 1 x∈ [-∞, -1) ∪ [ 1, +∞] x≠-1, x≠1
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