/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 32 Evaluate the given expression wi... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Evaluate the given expression without using a calculator. $$\log (\log (10,000,000,000))$$

Short Answer

Expert verified
Answer: The value of the expression is 1.

Step by step solution

01

Identify the base of logarithm

Since there is no given base for the logarithm function, we can assume it to be 10. So, the expression can be rewritten as: $$\log_{10} (\log_{10} (10,000,000,000))$$
02

Evaluate the inner logarithm

First, we will evaluate the inner logarithm expression. $$\log_{10} (10,000,000,000)$$ Recall that the logarithm \(\log_{a}b\) is the exponent to which the base \(a\) has to be raised to obtain the number \(b\). In this case, we need to find the power to which 10 has to be raised to get the number 10,000,000,000. 10,000,000,000 can be written as \(10^{10}\). So, $$\log_{10} (10,000,000,000) = \log_{10} (10^{10}) = 10$$ Now, we have reduced the expression to: $$\log_{10} (10)$$
03

Evaluate the final expression

Now we need to find the power to which 10 has to be raised to get the number 10. 10 can be written as \(10^{1}\). So, $$\log_{10} (10) = \log_{10} (10^{1}) = 1$$ Therefore, the value of the expression $$\log (\log (10,000,000,000))$$ is equal to 1.

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Key Concepts

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

Logarithm Laws
Understanding the laws of logarithms is akin to acquiring a new language in mathematics, particularly when it comes to simplifying complex logarithmic expressions. Logarithm laws essentially explain how to handle the multiplication, division, and exponentiation of logarithms. For example, the property \(\log_a(x^k) = k \cdot \log_a(x)\) allows us to take an exponent inside a logarithm and turn it into a multiplication factor on the outside. This is precisely what was applied in the exercise to simplify \(\log_{10}(10^{10})\) to \(10\).

Similarly, other laws such as the product law \(\log_a(m \cdot n) = \log_a(m) + \log_a(n)\), and the quotient law \(\log_a(\frac{m}{n}) = \log_a(m) - \log_a(n)\), enable one to deconstruct and reconstruct logarithmic expressions with greater ease. These rules are fundamental to making sense of logarithms and are essential tools for solving logarithmic equations and evaluating expressions like the one in our exercise.
Base 10 Logarithm
The base 10 logarithm, often denoted as \(\log\) without any subscript, is ubiquitously used in scientific calculations and exhibits a close relationship with our decimal numbering system. Whenever a base is not explicitly stated, we can infer that it is the common logarithm with a base of 10. In notation, it is represented as \(\log_{10}(x)\) or simply \(\log(x)\), and it answers the question: 'To what power do we raise 10 to obtain x?'.

For example, in the given exercise \(\log_{10} (10^{10})\), we are looking for the power to which the number 10 must be raised to yield \(10^{10}\), which straightforwardly is 10. The simplicity and utility of base 10 logarithms make them a cornerstone in understanding logarithmic scales, such as the ones used to measure earthquakes (Richter scale) or sound intensity (decibels).
Exponential Form
To appreciate logarithmic expressions like the one presented in the exercise, it's vital to grasp the principle of exponential form. Essentially, this concept refers to expressing a number using a base raised to an exponent. For instance, in the exponential form, the number 10,000,000,000 is expressed as \(10^{10}\).

This exponential notation is not just a shorthand; it's an intrinsic part of how we interact with growth processes, compound interest, and decay in nature and finance. When dealing with exponential form, the relationship between logarithms and exponents becomes evident: logarithms are the inverses of exponents. Consequently, in evaluating the exercise, when we say \(\log_{10}(10^{10}) = 10\), we are essentially reversing the process of exponentiation by determining the exponent that the base 10 is raised to, in order to result in \(10^{10}\).

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