When You Cannot Evaluate a Log

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Taught by mrbrianmclogan
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Part of video series
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Lesson Summary:

In this lesson, we learn how to evaluate a logarithmic function when it is not possible to do so. The example problem is two raised to what number equals negative 16. The teacher shows us how to transfer the problem to exponential form and then explains why it is not possible to evaluate this function. We learn that even if we try to make x negative, it will still not work. Therefore, the answer is that it is impossible to evaluate this function.

Lesson Description:

When you cannot evaluate a log

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Questions answered by this video:
  • 1. Can you find the log of a negative number ? 2. Can the log of a number be negative ?