1 / ( X^ - 1 ) = 1 : ( 1 / X ) = X
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1 / ( X ^ - 2 ) = 1 : ( 1 / X^2 ) = X^2
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X : X^2 = X ^ - 1 = 1 / X
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X = - 2
1 : ( - 2 ) = ( - 0,5 )
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ОТВЕТ минус 0,5