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Use common logarithms or natural logarithms and a calculator to evaluate to four decimal places. \(\log _{6} 17\)

Short Answer

Expert verified
Approximately 1.6308 or 1.631 when rounded to four decimal places.

Step by step solution

01

Apply Change of Base Formula

Utilize the Change of Base Formula to convert the base 6 to a base that your calculator can handle. The expression is then \(\frac{\log{17}}{\log{6}}\) or \(\frac{\ln{17}}{\ln{6}}\).
02

Perform Calculation

Now, compute both logarithms using your calculator. Make sure to use the same base for the numerator and denominator. For example, if you choose common logarithms (base 10), then calculate \(\log{17}\) and \(\log{6}\). If you choose natural logarithms (base e), then calculate \(\ln{17}\) and \(\ln{6}\).
03

Get the Quotient

Lastly, divide the first logarithm by the second to obtain the final answer. Your calculator should give you a decimal result.

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Key Concepts

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

Common logarithms
When we talk about common logarithms, we're referring to logarithms with a base of 10. This is the type of logarithm typically used in everyday calculations, especially before the widespread use of calculators that could compute logarithms in any base. In mathematical notation, a common logarithm of a number x is written as \( \log_{10}(x) \) or simply \( \log(x) \), assuming the base 10 is understood from context.

Most calculators have a dedicated button for common logarithms, labeled as 'LOG', making calculations with common logarithms convenient. An example of using common logarithms is to find the power to which 10 must be raised to obtain a certain number, such as deciphering the exponential growth of bacteria or converting between units in scientific notation. A crucial element to remember is that when calculating logarithms, the result is dimensionless—it only represents the exponent and not the units of the original quantity.

Furthermore, to utilize the Change of Base Formula with common logarithms for an expression like \( \log_{6}(17) \), you would compute \( \frac{\log(17)}{\log(6)} \) using your calculator. The convenience of using common logarithms is especially evident in this case, where many scientific calculators can only directly compute logarithms of base 10 and e.
Natural logarithms
On the other hand, natural logarithms are logarithms with the base e, where e is an irrational and transcendental number approximately equal to 2.71828. Natural logarithms are frequently used in higher mathematics, particularly in calculus, because of their intrinsic relationship with the exponential function. In equations, a natural logarithm of a number x is denoted as \( \ln(x) \).

It is essential to distinguish between common and natural logarithms because they are used in various types of calculations. For instance, natural logarithms are a fundamental part of the continuous compound interest formula and in analyzing natural growth processes. Like common logarithms, most scientific calculators also feature a button for calculating natural logarithms, identified as 'LN'.

Using the Change of Base Formula for natural logarithms, \( \log_{6}(17) \) becomes \( \frac{\ln(17)}{\ln(6)} \). When working with natural logarithms, it's crucial to remember that although the base e may not seem as intuitive as base 10, it provides certain mathematical advantages in the study of exponentials and logarithms.
Logarithmic calculation
The process of logarithmic calculation involves finding the exponent by which a given base must be raised to produce a certain number. Practical computing with logarithms can be done either by using common or natural logarithms, depending on the context of the problem. Calculations with logarithms can seem daunting, but by understanding the relationship between exponents and logarithms and with the aid of a scientific calculator, they become quite manageable.

For example, when you encounter a logarithmic expression like \( \log_{6}(17) \), without a calculator that directly computes logarithms to the base of 6, you need to change the base to 10 or e. Thus, using the Change of Base Formula is almost a necessity when dealing with bases other than 10 or e in a typical calculator. By converting to a common logarithm or a natural logarithm, your calculator lets you efficiently find the solution to the original problem.

The choice between using common or natural logarithms for calculations depends on what's more convenient or suitable for the given context. Whether it's financial calculations, measuring PH levels, or solving for time in physics, logarithms play a vital role in simplifying and solving exponential equations.
Logarithmic properties
Understanding logarithmic properties can significantly simplify logarithmic computation. These properties exploit the relationship between exponents and logarithms and are founded on fundamental arithmetic operations. Here are some key properties:
  • The product rule states that the logarithm of a product is the sum of the logarithms: \( \log_b(mn) = \log_b(m) + \log_b(n) \).
  • The quotient rule suggests that the logarithm of a quotient is the difference between the logarithms: \( \log_b(\frac{m}{n}) = \log_b(m) - \log_b(n) \).
  • The power rule says that the logarithm of a power is the exponent times the logarithm of the base: \( \log_b(m^p) = p \cdot \log_b(m) \).
  • Change of Base Formula allows you to transition from one base to another, facilitating calculations on traditional calculators: \( \log_b(a) = \frac{\log_c(a)}{\log_c(b)} \) for any base c.

These properties not only help in calculating with logarithms but also in rewriting and simplifying complex logarithmic expressions. It's essential to master them for better proficiency in algebra, calculus, and beyond. When applied correctly, these rules enhance your ability to work across various disciplines involving exponential and logarithmic functions.

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Most popular questions from this chapter

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