Предмет: Алгебра, автор: Elizaveta586

Решите, пожалуйста, уравнение! Срочно! log5 ( x + 3 ) = 2 - log5 ( 2x - 1 )

Ответы

Автор ответа: Аноним

log5 ( x + 3 ) = log5 25/( 2x - 1 ), ОДЗ х>-3 и >1/2⇒x∈(1/2;≈)
x + 3=25/( 2x - 1 )
(x + 3)(2x - 1 )=25
2x²+5x-28=0,D=249
x1=(-5-√249)/4∈Jlp
x2=(-5+√249)/4

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