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DeuceHU17
@DeuceHU17
July 2022
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Помогите решить по действиям, пожалуйста
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hlopushinairina
(m/(n²-mn) +n/(m²-mn))·mn/(n+m)=(m/n(n-m)+n/m(m-n))·mn/(n+m)=
=(m²/mn(n-m)-n²/mn(n-m))·mn/(n+m)=(m²-n²)/mn(n-m)·mn/(n+m)=
=(m²-n²)mn/mn((n-m)(n+m)=(m²-n²)/(n²-m²)=-(m²-n²)/(m²-n²)=-1.
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Answers & Comments
=(m²/mn(n-m)-n²/mn(n-m))·mn/(n+m)=(m²-n²)/mn(n-m)·mn/(n+m)=
=(m²-n²)mn/mn((n-m)(n+m)=(m²-n²)/(n²-m²)=-(m²-n²)/(m²-n²)=-1.