
Concept explainers
(a)
To Find: The expression for the linear and quadratic approximations.
(a)

Answer to Problem 30E
The quadratic approximation is
Explanation of Solution
Given:
The given expression for the resistivity is
The temperature coefficient is
Calculation:
Consider the Taylor series of
Consider the expression for the resistivity is
Then, the linear approximation is
Consider the quadratic approximation is
The quadratic approximation is
(b)
To Find: The graph for the resistivity of the copper.
(b)

Answer to Problem 30E
The required graph is shown in Figure 2
Explanation of Solution
Given:
The thermal coefficient is
Calculation:
Consider the linear approximation is,
Then,
Consider the quadratic approximation is,
Then,
Enter the 3 functions after pressing the Y= button as shown in Figure 1
Figure 1
Then, the graph is shown in Figure 2
Figure 2
(c)
To Find: The values of
(c)

Answer to Problem 30E
The temperature range is
Explanation of Solution
Calculation:
The linear approximation is larger by 1 percent then,
The case when the linear approximation is less than one percent then,
Thus, the temperature range is
Chapter 8 Solutions
Single Variable Calculus: Concepts and Contexts, Enhanced Edition
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