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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.

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Sal rewrites 100=10^2 as a logarithmic equation and log_5 (1/125)=-3 as an exponential equation. Created by Sal Khan.

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

This topic covers: - Radicals & rational exponents - Graphs & end behavior of exponential functions - Manipulating exponential expressions using exponent properties - Exponential …

We also know that if we have a logarithm-- let me write it this way, actually-- if I have b times the log base a of c, this is equal to log base a of c to the bth power.

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 …

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, …

What you will learn in this lesson Logarithms, like exponents, have many helpful properties that can be used to simplify logarithmic expressions and solve logarithmic equations. This article …