Equações exponenciais e logaritmos(PROFESSORA ANDRÉA MARA)

http://www.youtube.com/watch?v=35IFN6CMKcU
http://www.youtube.com/watch?v=Xj9lw5-Ou9I
http://www.youtube.com/watch?v=BQcKmPJp5MY
http://www.youtube.com/watch?v=vVrEBsG71pE
http://www.youtube.com/watch?v=S9hw9aU-X6A
http://www.youtube.com/watch?v=anh5qwqz8gw
http://www.youtube.com/watch?v=1icROMqRLp4
http://www.youtube.com/watch?v=xxZl7bLgeT0
http://www.youtube.com/watch?v=CqDBsgfYNFc
http://www.youtube.com/watch?v=sy8P5uj3h-4
http://www.youtube.com/watch?v=U2lnI9MUZKk
http://www.youtube.com/watch?v=yxNfiuiwU-w