Proceed as in Example 3 in Section 6.1 to rewrite the given expression using a single power series whose general term involves xx. 00 00 2+ Σ n(n-1) cx- Σ. n = 2 n=0 00 + k = 2 X X )

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Proceed as in Example 3 in Section 6.1 to rewrite the given expression using a single power series whose general term involves xk.

***Understanding a Power Series Expression***

In this section, we'll explore how to rewrite a given expression using a single power series, focusing on expressions whose general term involves \( x^k \).

Consider the following expression:

\[ \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} + \sum_{n=0}^{\infty} c_n x^{n+2} \]

Our goal is to express this combined series as a single power series involving \( x^k \). 

To do so, we'll proceed similarly to the method outlined in Example 3 in Section 6.1.

Here is the given expression:

\[ \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} + \sum_{n=0}^{\infty} c_n x^{n+2} \]

### Breakdown of the Steps:
1. **Identify and Rewrite Each Sum:** 
    - For the first summation: \( \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} \):
        - Notice that the power of \( x \) is \( n-2 \). We can let \( k = n-2 \) which implies \( n = k+2 \).
        - Substitute \( n \) with \( k+2 \) in the first sum, and accordingly adjust the limits of summation from \( n=2 \) to \( \infty \):
          \[ \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} = \sum_{k=0}^{\infty} (k+2)(k+1)c_{k+2} x^k \]

    - For the second summation: \( \sum_{n=0}^{\infty} c_n x^{n+2} \):
        - Notice that the power of \( x \) is \( n+2 \). We can let \( k = n+2 \) which implies \( n = k-2 \).
        - Substitute \( n \) with \( k-2 \) (but keep in mind the negative indices should adjust the lower limit to match \( \sum_{k=2}^{\infty} \)):
          \[ \sum_{n=0}^{\infty} c_n x
Transcribed Image Text:***Understanding a Power Series Expression*** In this section, we'll explore how to rewrite a given expression using a single power series, focusing on expressions whose general term involves \( x^k \). Consider the following expression: \[ \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} + \sum_{n=0}^{\infty} c_n x^{n+2} \] Our goal is to express this combined series as a single power series involving \( x^k \). To do so, we'll proceed similarly to the method outlined in Example 3 in Section 6.1. Here is the given expression: \[ \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} + \sum_{n=0}^{\infty} c_n x^{n+2} \] ### Breakdown of the Steps: 1. **Identify and Rewrite Each Sum:** - For the first summation: \( \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} \): - Notice that the power of \( x \) is \( n-2 \). We can let \( k = n-2 \) which implies \( n = k+2 \). - Substitute \( n \) with \( k+2 \) in the first sum, and accordingly adjust the limits of summation from \( n=2 \) to \( \infty \): \[ \sum_{n=2}^{\infty} n(n-1)c_n x^{n-2} = \sum_{k=0}^{\infty} (k+2)(k+1)c_{k+2} x^k \] - For the second summation: \( \sum_{n=0}^{\infty} c_n x^{n+2} \): - Notice that the power of \( x \) is \( n+2 \). We can let \( k = n+2 \) which implies \( n = k-2 \). - Substitute \( n \) with \( k-2 \) (but keep in mind the negative indices should adjust the lower limit to match \( \sum_{k=2}^{\infty} \)): \[ \sum_{n=0}^{\infty} c_n x
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