a. Write the equation of the line that represents the linear approximation to the following function at the given point a. b. Use the linear approximation to estimate the given quantity. c. Compute the percent error in the approximation, 100. 1 f(x) = (512+x) 3; a = 0; f(0.1) a. L(x) = approximation - exact exact where the exact value is given by a calculat ...

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter2: Functions
Section: Chapter Questions
Problem 28P
icon
Related questions
Question
Parts a,b,c
### Linear Approximation of Functions

This problem involves using linear approximation to estimate the value of a function at a given point \(\mathbf{a}\) and also requires computing the percent error in the approximation. Here's a step-by-step guide to solve the problem:

#### 1. Problem Description

Given the function: 

\[ f(x) = (512+x)^{\frac{1}{3}} \]

And the point: 

\[ a = 0; \quad f(0) \]

#### 2. Tasks

**a. Write the equation of the line that represents the linear approximation to the following function at the given point a.**

**b. Use the linear approximation to estimate the given quantity.**

**c. Compute the percent error in the approximation** using the formula: 

\[ \text{Percent Error} = 100 \cdot \frac{|\text{approximation} - \text{exact}|}{\text{exact}} \]

where the exact value is given by a calculator.

### Step-by-Step Solution

**a. Writing the Equation of the Linear Approximation**

The linear approximation \( L(x) \) of a function at the point \( a \) is given by:

\[ L(x) = f(a) + f'(a)(x - a) \]

First, we need to calculate \( f(a) \):

\[ f(a) = (512 + 0)^{\frac{1}{3}} = 512^{\frac{1}{3}} \]

Next, we find the derivative \( f'(x) \):

\[ f(x) = (512 + x)^{\frac{1}{3}} \]
\[ f'(x) = \frac{1}{3} (512 + x)^{-\frac{2}{3}} \]

Evaluating the derivative at \( x = 0 \):

\[ f'(0) = \frac{1}{3} (512 + 0)^{-\frac{2}{3}} = \frac{1}{3} \cdot 512^{-\frac{2}{3}} \]

Now we construct \( L(x) \):

\[ L(x) = f(0) + f'(0)(x - 0) \]

**b. Using the Linear Approximation**

Estimate \( f(x) \) at a given value using \( L(x) \). This involves substituting the given
Transcribed Image Text:### Linear Approximation of Functions This problem involves using linear approximation to estimate the value of a function at a given point \(\mathbf{a}\) and also requires computing the percent error in the approximation. Here's a step-by-step guide to solve the problem: #### 1. Problem Description Given the function: \[ f(x) = (512+x)^{\frac{1}{3}} \] And the point: \[ a = 0; \quad f(0) \] #### 2. Tasks **a. Write the equation of the line that represents the linear approximation to the following function at the given point a.** **b. Use the linear approximation to estimate the given quantity.** **c. Compute the percent error in the approximation** using the formula: \[ \text{Percent Error} = 100 \cdot \frac{|\text{approximation} - \text{exact}|}{\text{exact}} \] where the exact value is given by a calculator. ### Step-by-Step Solution **a. Writing the Equation of the Linear Approximation** The linear approximation \( L(x) \) of a function at the point \( a \) is given by: \[ L(x) = f(a) + f'(a)(x - a) \] First, we need to calculate \( f(a) \): \[ f(a) = (512 + 0)^{\frac{1}{3}} = 512^{\frac{1}{3}} \] Next, we find the derivative \( f'(x) \): \[ f(x) = (512 + x)^{\frac{1}{3}} \] \[ f'(x) = \frac{1}{3} (512 + x)^{-\frac{2}{3}} \] Evaluating the derivative at \( x = 0 \): \[ f'(0) = \frac{1}{3} (512 + 0)^{-\frac{2}{3}} = \frac{1}{3} \cdot 512^{-\frac{2}{3}} \] Now we construct \( L(x) \): \[ L(x) = f(0) + f'(0)(x - 0) \] **b. Using the Linear Approximation** Estimate \( f(x) \) at a given value using \( L(x) \). This involves substituting the given
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps with 23 images

Blurred answer
Recommended textbooks for you
College Algebra
College Algebra
Algebra
ISBN:
9781305115545
Author:
James Stewart, Lothar Redlin, Saleem Watson
Publisher:
Cengage Learning
Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781337278461
Author:
Ron Larson
Publisher:
Cengage Learning
College Algebra
College Algebra
Algebra
ISBN:
9781337282291
Author:
Ron Larson
Publisher:
Cengage Learning
Calculus For The Life Sciences
Calculus For The Life Sciences
Calculus
ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
College Algebra (MindTap Course List)
College Algebra (MindTap Course List)
Algebra
ISBN:
9781305652231
Author:
R. David Gustafson, Jeff Hughes
Publisher:
Cengage Learning