x+1 -1)=...

August 2022 1 14 Report

(x²-1)(1/x-1 - 1/x+1 -1)=

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svetazuna (x²-1)*(1/(x-1) - 1/(x+1) -1) =
= (x²-1)*( (х+1)/(x²-1) - (х-1)/(x²-1) -(х²-1)/(х²-1) ) =
= (x²-1)*( (х+1 - х+1 - х²+1)/(х²-1) ) =
= (x²-1)*( (3-х²)/(х²-1) ) = 3 - х²

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