Chapter 3: Problem 30
Write each exponential equation in its equivalent logarithmic form. $$4=\left(\frac{1}{1024}\right)^{-1 / 5}$$
Short Answer
Expert verified
\(-\frac{1}{5} = \log_{\left(\frac{1}{1024}\right)}(4)\)
Step by step solution
01
Identify the general form
The exponential form is given as \( b^c = a \), which is equivalent in logarithmic form to \( c = \log_b(a) \). In this exercise, \( b = \left(\frac{1}{1024}\right)\), \( c = -\frac{1}{5} \), and \( a = 4 \).
02
Apply the conversion formula
Using the identified values, write the logarithmic form: \(-\frac{1}{5} = \log_{\left(\frac{1}{1024}\right)}(4)\).
03
Verify the equivalence
Check that both the exponential and logarithmic forms express the same relationship. We know from the logarithm definition that if \( -\frac{1}{5} = \log_{\left(\frac{1}{1024}\right)}(4)\), then raising \( \left(\frac{1}{1024}\right) \) to \( -\frac{1}{5} \) should result in 4, which matches the original equation \( 4=\left(\frac{1}{1024}\right)^{-1 / 5} \).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Exponential Form
The **exponential form** is a way of expressing numbers as a base raised to a particular power, or exponent. It's a fundamental mathematical concept that makes it easier to deal with large numbers, repeated multiplication, or fractional powers. For instance, when we say something like \( b^c = a \), we're expressing \( a \) in terms of the base \( b \) raised to the power \( c \). These simple components help us manipulate and understand expressions involving powers.
- Base \( b \): The number that is repeatedly multiplied.
- Exponent \( c \): The number of times the base is used as a factor.
- Result \( a \): The outcome of the base raised to the exponent.
Conversion Formula
The **conversion formula** is essential when switching between exponential and logarithmic forms. It acts as a bridge, allowing one to translate equations from one cleft of representation to another, helping us solve problems efficiently. The general conversion formula is:
- **Exponential to Logarithmic:** If \( b^c = a \), then we can express this as \( c = \log_b(a) \).- **Logarithmic to Exponential:** Conversely, if \( c = \log_b(a) \), this implies \( b^c = a \).This back-and-forth conversion is useful because logarithmic form can simplify computations involving large numbers by converting multiplication into addition. In our exercise, the exponential form \( 4=\left(\frac{1}{1024}\right)^{-1 / 5} \) is converted into its equivalent logarithmic form using the formula, resulting in \(-1/5 = \log_{\left(\frac{1}{1024}\right)}(4) \). This approach enables verification and easier manipulation of complex equations.
- **Exponential to Logarithmic:** If \( b^c = a \), then we can express this as \( c = \log_b(a) \).- **Logarithmic to Exponential:** Conversely, if \( c = \log_b(a) \), this implies \( b^c = a \).This back-and-forth conversion is useful because logarithmic form can simplify computations involving large numbers by converting multiplication into addition. In our exercise, the exponential form \( 4=\left(\frac{1}{1024}\right)^{-1 / 5} \) is converted into its equivalent logarithmic form using the formula, resulting in \(-1/5 = \log_{\left(\frac{1}{1024}\right)}(4) \). This approach enables verification and easier manipulation of complex equations.
Logarithm Definition
The **definition of a logarithm** provides a crucial mathematical concept used for solving equations where the unknown variable is an exponent. Simply put, a logarithm is the inverse operation of exponentiation, answering the question: 'To what power must a base be raised, to produce a given number?'
Logarithms are expressed using the notation \( \log_b(a) = c \). This means that base \( b \) raised to power \( c \) equals \( a \). Logs are extremely useful in mathematics, science, and engineering due to their property of transforming multiplication into addition, which simplifies calculations substantially.
Logarithms are expressed using the notation \( \log_b(a) = c \). This means that base \( b \) raised to power \( c \) equals \( a \). Logs are extremely useful in mathematics, science, and engineering due to their property of transforming multiplication into addition, which simplifies calculations substantially.
- Base (b): The number that is to be raised to a power.
- Argument (a): The number obtained by raising the base.
- Exponent (c): The logarithm value representing the power the base reaches to obtain the argument.