Chapter 9: Problem 23
Write each equation in exponential form. \(\log _{5} 125=3\)
Short Answer
Expert verified
The equation in exponential form is \(5^3 = 125\).
Step by step solution
01
Understanding the Equation
The given equation is in logarithmic form: \( \log_{5} 125 = 3 \). This means 125 is the result when base 5 is raised to the power of 3.
02
Rewriting in Exponential Form
To convert the logarithmic equation \( \log_{5} 125 = 3 \) into exponential form, we need to use the definition of a logarithm: \( \log_{b} a = c \) is equivalent to \( b^c = a \).
03
Apply the Definition
Using the definition, \( \log_{5} 125 = 3 \) converts to exponential form as \( 5^3 = 125 \).
04
Verification
To ensure the correctness of the conversion, verify by calculating: \( 5^3 = 5 \times 5 \times 5 = 125 \). The calculation is accurate, confirming the exponential form is correct.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Logarithmic form
Logarithmic form is a way of expressing equations where a number is represented as a base raised to a power. In the context of logarithms, the base indicates the number that is multiplied by itself a certain number of times. The formula \( \log_{b} a = c \) can be broken down as follows:
- \( b \) is the base
- \( a \) is the result
- \( c \) is the exponent or the number of times the base is multiplied by itself to achieve \( a \)
Logarithms
Logarithms are the inverse operations of exponentiation, just like subtraction is the inverse of addition. They provide a way to find out the power to which a base number should be raised to obtain another number. This concept is especially useful in many mathematical fields, such as calculus, algebra, and real-world applications like sound intensity and pH levels.**Here are some useful properties of logarithms:**
Logarithms are particularly handy when dealing with very large or very small numbers, by reducing multiplication operations into more manageable addition and subtraction tasks.
- Product Property: \( \log_{b}(xy) = \log_{b}(x) + \log_{b}(y) \)
- Quotient Property: \( \log_{b}\left(\frac{x}{y}\right) = \log_{b}(x) - \log_{b}(y) \)
- Power Property: \( \log_{b}(x^y) = y\log_{b}(x) \)
Logarithms are particularly handy when dealing with very large or very small numbers, by reducing multiplication operations into more manageable addition and subtraction tasks.
Exponents
Exponents are a fundamental part of mathematics, representing repeated multiplication of a number by itself. When a number is raised to the power of an exponent, it means multiplying the number (base) by itself as many times as indicated by the exponent. For instance, \( 5^3 \) means \( 5 \times 5 \times 5 \), which equals 125.Exponential notation is a concise way to express very large or very small numbers.
Here are some important rules:
Here are some important rules:
- Multiplication of Same Base: \( a^m \times a^n = a^{m+n} \)
- Division of Same Base: \( \frac{a^m}{a^n} = a^{m-n} \)
- Power of a Power: \( (a^m)^n = a^{mn} \)
- Zero Exponent Rule: \( a^0 = 1 \), assuming \( a eq 0 \)