Question

1)log4(3x-18)=2
замена 2=log4 4^2

2)log(7x-13)>2
Замена 2=log3 3^2

Answer 1

$log_4(3x-18)=2; ; ; ; ODZ:; ; 3x textgreater 18,; ; x textgreater 6\\3x-18=4^2\\3x=34\\x=11frac{1}{3}; ; ; -; ; otvet\\2); ; log_3(7x-13) textgreater 2; ,; ; ; ; ODZ:; ; 7x textgreater 13,; x textgreater frac{13}{7},; x textgreater 1frac{6}{7} \\7x-13 textgreater 3^2\\7x textgreater 22\\x textgreater 3frac{1}{7}; ; -; ; otvet$