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Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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### Problem 1:

**Objective:**
Find the Taylor series for \( f(x) = e^{5x} \) centered at \( c = -3 \).

**Instruction:**
Use a table to solve the problem.

This problem involves finding the Taylor series expansion of the function \( f(x) = e^{5x} \) about the center \( x = -3 \). A Taylor series is a representation of a function as an infinite sum of terms calculated from the values of its derivatives at a single point.

To solve this, you will need to construct a table that includes the necessary derivatives of \( f(x) \) evaluated at \( x = -3 \). Then, use the formula for the Taylor series to write the expansion.

### Steps to Solve:
1. **Calculate the derivatives:**
   - \( f(x) = e^{5x} \)
   - First derivative: \( f'(x) = 5e^{5x} \)
   - Second derivative: \( f''(x) = 25e^{5x} \)
   - Third derivative: \( f^{(3)}(x) = 125e^{5x} \)
   - Continue this pattern to find as many derivatives as needed.
   
2. **Evaluate at \( x = -3 \):**
   - \( f(-3) = e^{-15} \)
   - \( f'(-3) = 5e^{-15} \)
   - \( f''(-3) = 25e^{-15} \)
   - \( f^{(3)}(-3) = 125e^{-15} \)
   - And so on...

3. **Construct the Taylor series:**
   The Taylor series for a function \( f(x) \) centered at \( c \) is given by:
   \[
   f(x) = \sum_{n=0}^{\infty} \frac{f^{(n)}(c)}{n!} (x - c)^n
   \]
   For this problem, \( c = -3 \).

4. **Write the series:**
   Substitute the evaluated derivatives into the Taylor series formula to find the expansion.

Using these steps and the constructed table, you can find the Taylor series for \( f(x) = e^{5x} \) centered at \( c = -3 \).
Transcribed Image Text:### Problem 1: **Objective:** Find the Taylor series for \( f(x) = e^{5x} \) centered at \( c = -3 \). **Instruction:** Use a table to solve the problem. This problem involves finding the Taylor series expansion of the function \( f(x) = e^{5x} \) about the center \( x = -3 \). A Taylor series is a representation of a function as an infinite sum of terms calculated from the values of its derivatives at a single point. To solve this, you will need to construct a table that includes the necessary derivatives of \( f(x) \) evaluated at \( x = -3 \). Then, use the formula for the Taylor series to write the expansion. ### Steps to Solve: 1. **Calculate the derivatives:** - \( f(x) = e^{5x} \) - First derivative: \( f'(x) = 5e^{5x} \) - Second derivative: \( f''(x) = 25e^{5x} \) - Third derivative: \( f^{(3)}(x) = 125e^{5x} \) - Continue this pattern to find as many derivatives as needed. 2. **Evaluate at \( x = -3 \):** - \( f(-3) = e^{-15} \) - \( f'(-3) = 5e^{-15} \) - \( f''(-3) = 25e^{-15} \) - \( f^{(3)}(-3) = 125e^{-15} \) - And so on... 3. **Construct the Taylor series:** The Taylor series for a function \( f(x) \) centered at \( c \) is given by: \[ f(x) = \sum_{n=0}^{\infty} \frac{f^{(n)}(c)}{n!} (x - c)^n \] For this problem, \( c = -3 \). 4. **Write the series:** Substitute the evaluated derivatives into the Taylor series formula to find the expansion. Using these steps and the constructed table, you can find the Taylor series for \( f(x) = e^{5x} \) centered at \( c = -3 \).
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