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Solve. Where appropriate, include approximations to three decimal places. If no solution exists, state this. $$ \log x=0.6 $$

Short Answer

Expert verified
x \approx 3.981

Step by step solution

01

- Understand the Logarithmic Form

The equation given is \(\text{log} x = 0.6\). This is a logarithmic equation in terms of base 10 (common logarithm).
02

- Convert Logarithmic Form to Exponential Form

Rewrite the logarithmic equation \(\text{log} x = 0.6\) as an exponential equation. The exponential form is given by \(x = 10^{0.6}\).
03

- Calculate the Value

Now, calculate the value of \(10^{0.6}\). Using a calculator or logarithm tables, we find that \(10^{0.6} \approx 3.981\).
04

- Check for No Solution

Since the exponential function always yields a positive result for real exponents, there is no scenario where there is no solution in this case.

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Key Concepts

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

exponential form
Understanding and working with exponential form is key when solving logarithmic equations.

When you have a logarithmic equation like \(\text{log} x = 0.6\), you're essentially saying that 10 raised to some power equals 'x'. This is the basis of logarithms: finding the power to which a base number (in this case, 10) must be raised to achieve a given number.
To solve \(\text{log} x = 0.6\), we convert it to its exponential form. We rewrite this equation as \(x = 10^{0.6}\).

This conversion is crucial because it transforms the problem into a more familiar form that's easier to solve. In exponential form, you can use straightforward calculations to find 'x'. Converting between logarithmic and exponential forms is a foundational skill in algebra, and it can be especially handy in solving real-world problems where growth or decay is involved.
So remember, any logarithmic equation \(\text{log}_b y = x\) can be converted to exponential form \((y = b^x)\).
common logarithm
The common logarithm is the logarithm with base 10, denoted as \(\text{log}\) or sometimes \(\text{log}_{10}\).

It's called 'common' because of its widespread use, particularly in sciences and engineering. Whenever you see \(\text{log}\) without any base specified, it's usually the base 10 log. This is the type of logarithm used in our original problem, \(\text{log} x = 0.6\).

Common logarithms are useful for simplifying large numbers, especially in exponential growth scenarios. They help in converting multiplicative processes into additive ones, making complex calculations more manageable. When you have \(\text{log} x\), and you want to convert it into its actual numeric value, you can use the fact that \(\text{log} x = 0.6\) converts to exponential form, \(x = 10^{0.6}\).
This helps you to easily compute 'x' as a precise value, using calculators or logarithm tables.

Common logarithms are generally noted in data sciences for logarithmic scales, such as the Richter scale for earthquake magnitudes or pH measures in chemistry.
approximations
Approximations are vital for solving equations involving logarithms, especially when exact values are complicated or unwieldy.

In our solution, we found that \(10^{0.6} \approx 3.981\). This is an approximation to three decimal places. Approximations allow us to work with manageable numbers without losing much precision, at least in most practical contexts.

When solving equations logarithmically, calculators and logarithm tables often give us results that are rounded or approximate. It's important to know how accurate your approximation needs to be. For instance, in scientific calculations, rounding to three decimal places (as in the given exercise) is often useful and sufficient.

To get such an approximation, you can use:
  • A scientific calculator by inputting \(10^{0.6}\).
  • Logarithm tables if you want a manual approach.
Understanding how to work with approximations ensures that you can solve problems accurately and efficiently without needing exact values, making complex or tedious calculations more approachable.

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