Calcutt lim Zx + Sin x V(x-1)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Title: Calculating the Limit of a Function

Content:

In this example, we are tasked with calculating the limit of the following mathematical expression as \( x \) approaches 0:

\[ \lim_{{x \to 0}} \frac{2x + \sin(x)}{x(1-x)} \]

To solve this, we need to apply limit laws and potentially L'Hopital's Rule, since this limit involves a fraction where the numerator and denominator both approach 0 as \( x \) approaches 0. 

Steps:
1. **Substitute x with 0 in the expression**: Initially substitute \( x = 0 \) to check the form of the limit:
   \[ \frac{2(0) + \sin(0)}{0(1-0)} = \frac{0 + 0}{0 \cdot 1} = \frac{0}{0} \]

   Since we obtain the indeterminate form \( \frac{0}{0} \), we need to apply further methods, such as L'Hopital's Rule. This rule states that for the limits of the indeterminate form \( \frac{0}{0} \) or \( \frac{\pm\infty}{\pm\infty} \), we can take the derivatives of the numerator and the denominator:

2. **Differentiate numerator and denominator separately**:
   - Numerator: \( \frac{d}{dx}(2x + \sin(x)) = 2 + \cos(x) \)
   - Denominator: \( \frac{d}{dx}[x(1-x)] = \frac{d}{dx}[x - x^2] = 1 - 2x \)

3. **Apply L'Hopital's Rule**: Substitute these derivatives back into the limit expression:
   \[ \lim_{{x \to 0}} \frac{2 + \cos(x)}{1 - 2x} \]

4. **Evaluate the limit**: Now substitute \( x = 0 \) to compute the limit:
   \[ \frac{2 + \cos(0)}{1 - 2(0)} = \frac{2 + 1}{1 - 0} = \frac{3}{1} = 3 \]

Therefore, the limit of the given function as \( x \) approaches 0 is
Transcribed Image Text:Title: Calculating the Limit of a Function Content: In this example, we are tasked with calculating the limit of the following mathematical expression as \( x \) approaches 0: \[ \lim_{{x \to 0}} \frac{2x + \sin(x)}{x(1-x)} \] To solve this, we need to apply limit laws and potentially L'Hopital's Rule, since this limit involves a fraction where the numerator and denominator both approach 0 as \( x \) approaches 0. Steps: 1. **Substitute x with 0 in the expression**: Initially substitute \( x = 0 \) to check the form of the limit: \[ \frac{2(0) + \sin(0)}{0(1-0)} = \frac{0 + 0}{0 \cdot 1} = \frac{0}{0} \] Since we obtain the indeterminate form \( \frac{0}{0} \), we need to apply further methods, such as L'Hopital's Rule. This rule states that for the limits of the indeterminate form \( \frac{0}{0} \) or \( \frac{\pm\infty}{\pm\infty} \), we can take the derivatives of the numerator and the denominator: 2. **Differentiate numerator and denominator separately**: - Numerator: \( \frac{d}{dx}(2x + \sin(x)) = 2 + \cos(x) \) - Denominator: \( \frac{d}{dx}[x(1-x)] = \frac{d}{dx}[x - x^2] = 1 - 2x \) 3. **Apply L'Hopital's Rule**: Substitute these derivatives back into the limit expression: \[ \lim_{{x \to 0}} \frac{2 + \cos(x)}{1 - 2x} \] 4. **Evaluate the limit**: Now substitute \( x = 0 \) to compute the limit: \[ \frac{2 + \cos(0)}{1 - 2(0)} = \frac{2 + 1}{1 - 0} = \frac{3}{1} = 3 \] Therefore, the limit of the given function as \( x \) approaches 0 is
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