dx A student solves the following thusly: ° (x–1)* =-1-1=-2. Explain in detail x-1],

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Author:James Stewart
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Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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**Problem Statement**: A student solves the following integral:

\[
\int_{0}^{2} \frac{dx}{(x-1)^{2}} = \left[ -\frac{1}{x-1} \right]_{0}^{2} = -1 - 1 = -2
\]

**Explanation of the Mistake**:
The student evaluated the indefinite integral correctly when they found that the antiderivative of \(\frac{1}{(x-1)^2}\) is \(-\frac{1}{x-1}\). However, the mistake occurred during the evaluation of the definite integral's limits from 0 to 2:

When calculating \(\left[ -\frac{1}{x-1} \right]_{0}^{2}\), the student should have recognized that \(x = 1\) is a point of discontinuity. Specifically, \(-\frac{1}{x-1}\) becomes undefined when \(x = 1\). The student incorrectly assessed both the limit evaluations at \(x=0\) and \(x=2\) without addressing this discontinuity, leading to an incorrect solution.

**Correct Solution**:
1. **Evaluate Limit as \(x\) Approaches 1**:
   - Recognize that the integral is improper due to the discontinuity at \(x = 1\).
   
2. **Split the Integral**:
   \[
   \int_{0}^{2} \frac{dx}{(x-1)^{2}} = \int_{0}^{1} \frac{dx}{(x-1)^{2}} + \int_{1}^{2} \frac{dx}{(x-1)^{2}}
   \]

3. **Evaluate Each Integral Separately**:
   - For \(\int_{0}^{1} \frac{dx}{(x-1)^{2}}\), calculate the limit as \(x\) approaches 1 from the left.
   - For \(\int_{1}^{2} \frac{dx}{(x-1)^{2}}\), calculate the limit as \(x\) approaches 1 from the right.

4. **Note Divergence**:
   - Both limits diverge as they approach infinity.

Thus, the integral diverges to \(\infty\) due to the discontinuity, indicating that the improper integral is undefined over
Transcribed Image Text:**Problem Statement**: A student solves the following integral: \[ \int_{0}^{2} \frac{dx}{(x-1)^{2}} = \left[ -\frac{1}{x-1} \right]_{0}^{2} = -1 - 1 = -2 \] **Explanation of the Mistake**: The student evaluated the indefinite integral correctly when they found that the antiderivative of \(\frac{1}{(x-1)^2}\) is \(-\frac{1}{x-1}\). However, the mistake occurred during the evaluation of the definite integral's limits from 0 to 2: When calculating \(\left[ -\frac{1}{x-1} \right]_{0}^{2}\), the student should have recognized that \(x = 1\) is a point of discontinuity. Specifically, \(-\frac{1}{x-1}\) becomes undefined when \(x = 1\). The student incorrectly assessed both the limit evaluations at \(x=0\) and \(x=2\) without addressing this discontinuity, leading to an incorrect solution. **Correct Solution**: 1. **Evaluate Limit as \(x\) Approaches 1**: - Recognize that the integral is improper due to the discontinuity at \(x = 1\). 2. **Split the Integral**: \[ \int_{0}^{2} \frac{dx}{(x-1)^{2}} = \int_{0}^{1} \frac{dx}{(x-1)^{2}} + \int_{1}^{2} \frac{dx}{(x-1)^{2}} \] 3. **Evaluate Each Integral Separately**: - For \(\int_{0}^{1} \frac{dx}{(x-1)^{2}}\), calculate the limit as \(x\) approaches 1 from the left. - For \(\int_{1}^{2} \frac{dx}{(x-1)^{2}}\), calculate the limit as \(x\) approaches 1 from the right. 4. **Note Divergence**: - Both limits diverge as they approach infinity. Thus, the integral diverges to \(\infty\) due to the discontinuity, indicating that the improper integral is undefined over
Expert Solution
Step 1

Let the given integral be - y = 02dxx-12y = 02x-1-2dxUsing integration formula - xndx = xn+1n+1+Cy = x-1-2+1-2+102y = -x-1-102y = -1x-102y = -12-1-10-1y = -1--1y = -2Hence,02dx(x-1)2 = -2

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