Предмет: Математика, автор: avavanes

Помогите решить, если не трудно.
-Найдите значение выражения log0,3(10) − log0,3(3)+4^log 4 (5).
-Решить уравнение: log6 (7 −х) = log6(х − 1).

Ответы

Автор ответа: mukus13
3
1)

 log_{0.3}10-  log_{0.3}3+ 4^{ log_{4}5 }= log_{0.3} \frac{10}{3}+5 = log_{0.3}( 0.3)^{-1} +5=-1+5=4

2)

 log_{6}(7-x)= log_{6}(x-1)

ОДЗ:
 \left \{ {{7-x\ \textgreater \ 0} \atop {x-1\ \textgreater \ 0}} \right.

 \left \{ {{x\ \textless \ 7} \atop {x\ \textgreater \ 1}} \right.

x ∈ (1;7)

 7-x=x-1

-x-x=-1-7

-2x=-8

2x=8

x=4

Ответ:  4

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