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Write each equation in exponential form. (a) \(\log _{2} 32=5\) (b) \(\log _{10} 1=0\) (c) \(\log _{e} \sqrt{e}=1 / 2\) (d) \(\ln (1 / e)=-1\)

Short Answer

Expert verified
(a) \(2^5 = 32\); (b) \(10^0 = 1\); (c) \(e^{1/2} = \sqrt{e}\); (d) \(e^{-1} = 1/e\).

Step by step solution

01

Understanding Logarithms

A logarithm \(\log_b a=c\) represents an exponential form \(b^c = a\), where \(b\) is the base, \(a\) is the result, and \(c\) is the exponent.
02

Convert (a) to Exponential Form

Given \(\log_{2} 32 = 5\), rewrite as \(2^5 = 32\). Here, 2 is the base, 32 is the result, and 5 is the exponent.
03

Convert (b) to Exponential Form

Given \(\log_{10} 1 = 0\), rewrite as \(10^0 = 1\). Here, 10 is the base, 1 is the result, and 0 is the exponent.
04

Convert (c) to Exponential Form

Given \(\log_{e} \sqrt{e} = \frac{1}{2}\), rewrite as \(e^{1/2} = \sqrt{e}\). Here, \(e\) is the base, \(\sqrt{e}\) is the result, and \(\frac{1}{2}\) is the exponent.
05

Convert (d) to Exponential Form Using Natural Logarithm

Given \(\ln (1/e) = -1\), recognize that \(\ln\) implies a base of \(e\). Rewrite as \(e^{-1} = \frac{1}{e}\). Here, \(e\) is the base, \(\frac{1}{e}\) is the result, and \(-1\) is the exponent.

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Key Concepts

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

Exponential Form
In mathematics, the exponential form is a useful way to express relationships between numbers and their powers. It elegantly represents the concept of repeated multiplication. To break it down:
  • The base is the number being multiplied.
  • The exponent tells us how many times to multiply the base by itself.
  • The result is the final computation after following the steps of multiplication.
For example, in the expression \(b^c = a\), \(b\) is the base, \(c\) is the exponent, and \(a\) is the result. This notation simplifies complex calculations, especially those involving growth patterns, areas, and volumes.
Understanding the transition from logarithmic equations to exponential form, as shown in the original exercise, strengthens one's ability to move between different mathematical terrains seamlessly. These skills are crucial in higher-level mathematics and various application fields.
Conversion of Logarithms
Logarithms are essentially the inverse operations of exponentiation. They help us find the unknown exponent in an equation. When dealing with the expression \(\log_b a = c\), the aim is to find what power \(c\) raises base \(b\) to arrive at the result \(a\).
To convert from a logarithmic to an exponential form, you are simply rearranging the components: \(b^c = a\) clarifies the relationship. Each part of this expression encodes specific mathematical information:
  • \(b\) is the base of the logarithm, representing the consistent factor to be multiplied.
  • \(c\) is the exponent found on the opposite side of the logarithmic equation \(\log_b\).
  • \(a\) is the number you are achieving as the result of this multiplication.
Mastering the conversion of logarithms to exponential form ensures efficiency in solving many real-world problems involving exponential growth or decay, such as population studies and radioactive decay.
Mathematics Education
Educating students in mathematics goes beyond rote memorization of formulas; it involves imparting skills to manipulate numbers and operations logically and meaningfully. Understanding concepts like logarithms and their exponents is fundamental. This foundational knowledge helps in developing critical thinking and problem-solving skills.
Teaching these concepts requires clarity and step-by-step guidance. Teachers often encourage students to:
  • Visualize problems through drawing and modeling.
  • Practice converting between logarithmic and exponential forms repeatedly to reinforce understanding.
  • Engage in discussions with peers to deepen conceptual comprehension.
By using such techniques, mathematics education can build confidence and competence, preparing students for advanced studies and varied career paths. It's about illustrating the relevance and coherence of mathematics in everyday life and scientific inquiry.

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