Ответ: 81^(1/2-2)=81^(-1,5)=1/81^(1,5)=1/(81*9)=1/729.
Объяснение:
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Ответ: 81^(1/2-2)=81^(-1,5)=1/81^(1,5)=1/(81*9)=1/729.
Объяснение: