Inverse Functions
Inverse Functions
Evaluating Logs
To evaluate a logarithmic expression, convert to its corresponding exponential form and solve.
Example Evaluate
Step 1. Convert the log to its equivalent exponential form.
![EvalLogs1-2 EvalLogs1-2](https://claregladwinresd.glk12.org/pluginfile.php/950/mod_book/chapter/314/Exponential_and_Logarithmic_Functions/Images/EvalLogs1-2.png)
Step 2. Solve for x by rewriting 16 as a power with a base of 2.
![EvalLogs1-3 EvalLogs1-3](https://claregladwinresd.glk12.org/pluginfile.php/950/mod_book/chapter/314/Exponential_and_Logarithmic_Functions/Images/EvalLogs1-3.png)
Step 3. Substitute 24 in for 16 in step 1.
![EvalLogs1-4 EvalLogs1-4](https://claregladwinresd.glk12.org/pluginfile.php/950/mod_book/chapter/314/Exponential_and_Logarithmic_Functions/Images/EvalLogs1-4.png)
Step 4. Now that the bases are equal, set the exponents equal to each other.
![EvalLogs1-5 EvalLogs1-5](https://claregladwinresd.glk12.org/pluginfile.php/950/mod_book/chapter/314/Exponential_and_Logarithmic_Functions/Images/EvalLogs1-5.png)