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nuriddinzadasha
@nuriddinzadasha
July 2022
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решите уравнение lg12-lgx = lg(5/6x-2/3)
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ramit08
Lg12-lgx = lg(5/6x-2/3),lg(12/x) = lg(5/6x-2/3),12/x = 5/6x-2/3,12/x=(5-4x)/6x,12*6x=x(5-4x),72x=5x-4x^2,4x^2+72x-5x=0,4x^2+67x=0,x(4x+67)=0,x=0 или 4х=-67,х=-67/4
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nuriddinzadasha
Тут у тя в ответе получилось -16,75, а в книжке ответ 16,75 а почему так получилось?
ramit08
чтобы получить ответ 16,75 условие должно быть lg12-lgx = lg(5/6x+2/3)..... может быть опечатка
nuriddinzadasha
Нет
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