Learn about the properties of logarithms that help us rewrite logarithmic expressions, and about the change of base rule that allows us to evaluate any logarithm we want using the calculator.

Sal explains what logarithms are and gives a few examples of finding logarithms. Created by Sal Khan.

Logarithms are the inverses of exponents. They allow us to solve challenging exponential equations, and they are a good excuse to dive deeper into the relationship between a function …

Sal explains what logarithms are and gives a few examples of finding logarithms. Created by Sal Khan.

Before solving these problems though, we need to know how exactly logarithmic and exponential statements are connected. Specifically, the different parts of both equations.

Learn how to solve any exponential equation of the form a⋅b^ (cx)=d. For example, solve 6⋅10^ (2x)=48. The key to solving exponential equations lies in logarithms! Let's take a closer look by …

Learn algebra through engaging lessons on exponential and logarithmic functions at Khan Academy.

Course: Algebra 2 > Unit 8 Lesson 1: Introduction to logarithms Intro to logarithms Intro to Logarithms Evaluate logarithms Evaluating logarithms (advanced) Evaluate logarithms …

But when you evaluate a logarithm, you're getting an exponent that you would have to raise b to to get to a times c. But let's just apply this property right over here.

Logarithms were originally used to facilitate calculations before modern calculators existed. Logarithms made it easier to perform difficult operations, e.g. find the value of 4th root of 24, …