- #1
MrGandalf
- 30
- 0
Homework Statement
I know the sum of the Laurent series (around x=2) is equal to
[tex]\frac{1}{x+3}[/tex]
But I can't find what the series is from this information alone.
Homework Equations
In the textbook, you have (for -1 < x < 1):
[tex]\frac{1}{1-x} = \sum_{n=0}^{\infty}x^n[/tex]
and for |x|>1 I know (but have no idea how to deduce) that
[tex]\frac{1}{1+x} = \sum_{n=1}^{\infty}\frac{(-1)^{n+1}}{x^n}[/tex]
I just don't know how I can use this information to find the sum for 1/(x+3).
The Attempt at a Solution
I am sorry, but I don't want to further destroy my confidence by reliving my pathetic attempts to finding the solution. :D