Question

Aflati log(cu baza 3) al lui (9b),stiind ca log(cu baza 3) al lui b=5.CUM SA REZOLV.IMI TREBUIE URGENT!!!!!!!!

Answer 1

$log_{3}9b= log_{3}9+ log_{3}b =2+5 =7$

Answer 2

$log _{3}(9b)=log _{3}9+log_{3}b=log_33 ^{2}+log_{3}b=2+5=7.$
am folosit formulele $log_{n}(AB)=log _{n}A+ log _{n}B \\ log_{n}n ^{x}=x$