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Автор - taniasuper1997

log₅(9-2)+log₅125=5 решите уравнение, пожалуйста

Ответ

Автор - Zhiraffe

Log₅(9-2)+log₅125=5 <=> Log₅7+3=5 <=> Log₅7=2 - это не верно ))

Если же Log₅(9-x)+log₅125=5 <=> Log₅(9-x)+3=5 <=> Log₅(9-x)=2 <=> Log₅(9-x)=2*Log₅5 <=> Log₅(9-x)=Log₅25 <=> 9-x=25 <=> x=-16.

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