/*! 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 104 Write each equation in its equiv... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Write each equation in its equivalent exponential form. Then solve for x. $$\log _{64} x=\frac{2}{3}$$

Short Answer

Expert verified
The equivalent exponential form of the equation is \(64^\frac{2}{3} = x\). Solving for x gives \(x = 16\).

Step by step solution

01

Write the logarithmic equation in its exponential form

The logarithmic equation is given by \(\log _{64} x=\frac{2}{3}\). We can convert this into exponential form using the rule mentioned above. So it becomes: \(64^\frac{2}{3} = x\)
02

Solve for x

Use the rule for exponentiation which states that \(a^\frac{m}{n} = \sqrt[n]{a^m}\). Therefore, \(64^\frac{2}{3} = \sqrt[3]{64^2}\). We know that \(\sqrt[3]{64} = 4\) and \(4^2 = 16\). So, \(x = 16\)

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

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

Logarithmic Equations
Logarithmic equations come in handy when you need to solve equations involving logarithmic expressions. These equations are tied to their inverse operations, exponents. So, when we have a logarithmic equation, such as \( \log_{b}(x) = y \), it reads as "Log base \( b \) of \( x \) is equal to \( y \)." This actually means that \( x \) is \( b \) raised to the power of \( y \).
To transform a logarithmic equation into a more solvable exponential form, you can apply this principle. This transformation can help unveil solutions that may not be apparent in the logarithmic expression alone. Writing \( \log_{64}(x) = \frac{2}{3} \) as an exponential equation gives \( 64^{\frac{2}{3}} = x \).
Using this approach allows you to shift perspectives from the log equation to one where you can directly solve for \( x \) through exponentiation.
Solving for x
Once a logarithmic equation is converted into its exponential form, your next step is to solve for \( x \). This involves evaluating the number that results from the exponential expression.
Consider the converted equation \( 64^{\frac{2}{3}} = x \). It may initially look complex because of the fractional exponent, but breaking it down into simpler steps helps. Fractional exponents signify roots and powers; specifically, the denominator can be viewed as the root while the numerator indicates the power. Thus, \( 64^{\frac{2}{3}} \) is equivalent to \( (\sqrt[3]{64})^2 \).
By understanding and implementing this method, it becomes more straightforward to isolate and solve for \( x \). Evaluating \( \sqrt[3]{64} \) gives \( 4 \), and squaring it results in \( 16 \). Thus, \( x = 16 \). This step-by-step method can simplify seemingly complicated calculations.
Exponentiation Rule
The exponentiation rule is a powerful tool in mathematics, particularly when dealing with fractional exponents. It allows the transformation and simplification of mathematical expressions.
Consider \( a^{\frac{m}{n}} \). This expression can be decomposed using the exponentiation rule into \( (\sqrt[n]{a})^m \) or equivalently, \( \sqrt[n]{a^m} \). Both expressions provide clarity and ease in computation. For instance, taking \( 64^{\frac{2}{3}} \), this can be translated into \( \sqrt[3]{64^2} \), or \( (\sqrt[3]{64})^2 \).
Applying this rule, you first determine the cube root of 64, which is 4, and then square the result to get 16. Working through such problems with the exponentiation rule offers a systematic and less daunting way to arrive at solutions, reinforcing the connection between exponents and logarithms.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Hurricanes are one of nature's most destructive forces. These low-pressure areas often have diameters of over 500 miles. The function \(f(x)=0.48 \ln (x+1)+27\) models the barometric air pressure, \(f(x),\) in inches of mercury, at a distance of \(x\) miles from the eye of a hurricane. The function \(W(t)=2600\left(1-0.51 e^{-0.075 t}\right)^{3}\) models the weight, \(W(t),\) in kilograms, of a female African elephant at age \(t\) years. (1 kilogram \(=2.2\) pounds) Use a graphing utility to graph the function. Then \([\mathrm{TRACE}]\) along the curve to estimate the age of an adult female elephant weighing 1800 kilograms.

Use the exponential growth model, \(A=A_{0} e^{k t},\) to show that the time it takes a population to double (to grow from \(A_{0}\) to \(\left.2 A_{0}\right)\) is given by \(t=\frac{\ln 2}{k}\)

The logistic growth function $$ P(x)=\frac{90}{1+271 e^{-0.122 x}} $$ models the percentage, \(P(x),\) of Americans who are \(x\) years old with some coronary heart disease. Use the function to solve Exercises \(43-46\) What percentage of 80 -year-olds have some coronary heart disease?

The logistic growth function $$ P(x)=\frac{90}{1+271 e^{-0.122 x}} $$ models the percentage, \(P(x),\) of Americans who are \(x\) years old with some coronary heart disease. Use the function to solve Exercises \(43-46\) What percentage of 20 -year-olds have some coronary heart disease?

Graph each of the following functions in the same viewing rectangle and then place the functions in order from the one that increases most slowly to the one that increases most rapidly. \(y=x, y=\sqrt{x}, y=e^{x}, y=\ln x, y=x^{x}, y=x^{2}\)

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.