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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.
Sal rewrites log_5([25^x]/y) as 2x-log_5(y) by using both the log subtraction property and the log multiplied by a constant property.
Evaluate basic logarithmic expressions by using the fact that a^x=b is equivalent to log_a(b)=x.
Sal continues the discussion on e, this time digging deeper into the mathematical definition of 𝑒.
This topic covers: - Radicals & rational exponents - Graphs & end behavior of exponential functions - Manipulating exponential expressions using exponent properties - Exponential growth & decay - Modeling with exponential functions - Solving exponential equations - Logarithm properties - Solving logarithmic equations - Graphing logarithmic ...
Learn what logarithms are and how to evaluate them. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.
Khan Academy
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Sal explains what logarithms are and gives a few examples of finding logarithms.