Ответ: ( a - b )/( ab )
Объяснение:
(b⁻² - a⁻²) · [ ( a + b )/( ab ) ]⁻¹ = ( 1/b² - 1/a² ) * ( ab )/( a + b ) =
= [( a² - b² )/( a²b² ) ] * [ ( ab )/( a + b ) ] = ( a - b )/( ab ) .
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Ответ: ( a - b )/( ab )
Объяснение:
(b⁻² - a⁻²) · [ ( a + b )/( ab ) ]⁻¹ = ( 1/b² - 1/a² ) * ( ab )/( a + b ) =
= [( a² - b² )/( a²b² ) ] * [ ( ab )/( a + b ) ] = ( a - b )/( ab ) .