[tex]\log_{5}5=1\\
\\ \log_{2}2=1\\
\\ \log_{3}4=? \roghtarrow nu~il~putem~calcula~cu~mintea~sau~deduce~logic\\
\\ ai~formula~\boxed{\boxed{\log_{a}a=1}},~a>0,~a\neq1\\[/tex]
Daca~nu~pricepi~formula,~poti~gandi~asa:~log~in~baza~2~din~2~e~puterea~la~care~trebuie~ridicata~baza ~2~pentru~a~obtine~2.~E~evident~ca~trebuie~sa-l~ridicam~pe~2~la~puterea~1~ca~sane~dea~tot~2
