Предмет: Алгебра, автор: Shovkat

Математика. a=log 98 56 (98-основание). Выразите log 7 2 через a. help people, please

Ответы

Автор ответа: Аноним

a=log(7)56/log(7)98=(1+3log(7)2)/(2+3log(7)2)
2a+3alog(7)2=1+3log(7)2
3alog(7)2-3log(7)2=1-2a
log(7)2(3a-3)=1-2a
log(7)2=(1-2a)/(3a-3)

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