Предмет: Алгебра, автор: Sveta10000

Срочно....
Lg5x+lg(x-1)=1

Ответы

Автор ответа: sangers1959
3
lg(5x)+lg(x-1)=1
lg(5x/(x-1))=lg10
5x/(x-1)=10
5x=10x-10
5x=10
x=2.
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