- #1
RedBarchetta
- 50
- 1
Homework Statement
[tex]
\int {\frac{{2s + 2}}
{{(s^2 + 1)(s - 1)^3 }}ds}
[/tex]
The Attempt at a Solution
This is a long one...First, I split the integrand into partial fractions and find the coefficients:
[tex]
\begin{gathered}
\frac{{2s + 2}}
{{(s^2 + 1)(s - 1)^3 }} = \frac{{As + B}}
{{s^2 + 1}} + \frac{C}
{{s - 1}} + \frac{D}
{{(s - 1)^2 }} + \frac{E}
{{(s - 1)^3 }} \hfill \\
2s + 2 = (As + B)(s - 1)^3 + C(s^2 + 1)(s - 1)^2 + D(s^2 + 1)(s - 1) + E(s^2 + 1) \hfill \\
2s + 2 = (As + B)(s^3 - 3s^2 + 3s - 1) + C(s^4 - 2s^3 + 2s^2 - 2s + 1) + D(s^3 - s^2 + s - 1) + E(s^2 + 1) \hfill \\
\end{gathered}
[/tex]