Find the first three nonzero of each linearly independent power series solution around x, = 0 for y"+x'y'+xy =D0

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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**Problem Statement:**

Find the first three nonzero terms of each linearly independent power series solution around \( x_0 = 0 \) for the differential equation:

\[ y'' + x^2y' + xy = 0 \]

---

**Explanation:**

To solve this problem, we start by assuming a power series solution for \( y \) around \( x_0 = 0 \). Let:

\[ y = \sum_{n=0}^{\infty} a_n x^n \]

You'll need to find the coefficients \( a_n \) that satisfy the differential equation. By substituting the power series expansions for \( y \), \( y' \), and \( y'' \), and then equating the coefficients of each power of \( x \) to zero, you can determine the values for \( a_n \).

This process typically involves solving a recurrence relation for the coefficients. Work through these steps carefully, and you will determine the first three nonzero terms for each linearly independent solution.

---
Please follow these calculation steps as follows:

1. Write out the power series for \( y \), \( y' \), and \( y'' \).
2. Substitute these into the differential equation.
3. Group the powers of \( x \) and solve for the coefficients.

This approach ensures a methodical solution to finding the first three nonzero terms.
Transcribed Image Text:**Problem Statement:** Find the first three nonzero terms of each linearly independent power series solution around \( x_0 = 0 \) for the differential equation: \[ y'' + x^2y' + xy = 0 \] --- **Explanation:** To solve this problem, we start by assuming a power series solution for \( y \) around \( x_0 = 0 \). Let: \[ y = \sum_{n=0}^{\infty} a_n x^n \] You'll need to find the coefficients \( a_n \) that satisfy the differential equation. By substituting the power series expansions for \( y \), \( y' \), and \( y'' \), and then equating the coefficients of each power of \( x \) to zero, you can determine the values for \( a_n \). This process typically involves solving a recurrence relation for the coefficients. Work through these steps carefully, and you will determine the first three nonzero terms for each linearly independent solution. --- Please follow these calculation steps as follows: 1. Write out the power series for \( y \), \( y' \), and \( y'' \). 2. Substitute these into the differential equation. 3. Group the powers of \( x \) and solve for the coefficients. This approach ensures a methodical solution to finding the first three nonzero terms.
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