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Evaluate each expression without using a calculator. $$\log _{6} \frac{1}{6}$$

Short Answer

Expert verified
The value of \( \log_6 \frac{1}{6} \) is -1.

Step by step solution

01

Understanding the Logarithm

The logarithm \( \log_6 \frac{1}{6} \) can be interpreted as 'to what power must we raise 6 to get 1/6?' This is the inverse operation of exponentiation.
02

Evaluating the Logarithm

Since 6 raised to the power -1 gives us 1/6 (6^(-1) = 1/6), the value of \( \log_6 \frac{1}{6} \) is -1.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Exponentiation
Exponentiation involves raising a number, known as the base, to a specific power, called the exponent. This operation is fundamental in mathematics because it can express how many times to multiply a number by itself. For instance, if we have a base of 6 and raise it to the power of 2, we calculate as follows:
  • 6 multiplied by 6 results in 36, so we write this as 62 = 36.
In the context of the logarithm exercise, exponentiation plays a crucial role. Here, we're asked to identify the power to which the base 6 must be raised to result in the fraction 1/6.
This link between exponentiation and logarithms helps us efficiently solve problems involving powers and roots.
Inverse Operations
An important concept in mathematics is that of inverse operations. Inverse operations essentially undo each other. For example, addition and subtraction are inverse operations, just as multiplication and division are. Similarly, exponentiation and logarithms are inverse operations.
When we say that exponentiation and logarithms are inverses, it means that a logarithm can tell us the exponent needed to achieve a certain result from a base number. In the problem we are examining, the logarithmic function seeks to reverse the exponential process. It tells us what exponent is required to raise the base number (in this case, 6) to result in a specified value (here, 1/6).
Recognizing the relationship between these inverse operations simplifies problem-solving and deepens our understanding of the structure of mathematics.
Evaluating Logarithms
Evaluating a logarithm involves determining the exponent required to raise a base to achieve a given result. In simpler terms, it's asking, "What power do I need?" For instance, in our exercise,
  • we need to determine \(\log_6 \frac{1}{6}\).
  • The question is, "What power should 6 be raised to in order to make it equal to 1/6?"
  • By identifying that 6 raised to the \(-1\) power equals 1/6, or \(6^{-1} = \frac{1}{6}\), we find that this logarithm evaluates to -1.
To master evaluating logarithms, it's helpful to become familiar with common exponential workings and to practice reversing the process through various bases and outcomes. Logarithms make otherwise complex exponential equations more manageable and accessible, converting multiplicative problems into additive ones.

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