Welcome to Episode 10 of Season 3: Unlocking Advanced Topics! This episode introduces the fundamental concepts of logarithms. It begins by defining what a logarithm is and illustrating its relationship to exponential forms. The source then presents various important logarithmic formulas, including those for multiplication, division, and changes of base, while also discussing natural logarithms involving Euler's number. Finally, it touches upon logarithms in the context of geometric progressions and offers an example problem to apply the learned principles.