Question

log3 (x-7)=2 решить уравнение

Answer 1

$log_3(x-7)=2\ x-7 textgreater 0\ x textgreater 7\ log_3(x-7)=2*1\ log_3(x-7)=2*log_33\ log_3(x-7)=log_33^2\ x-7=9\ x=16$