Geometric power series of f(x)=6/(2-x) c=1

NIZBIT
Messages
69
Reaction score
0
Find the geometric power series for the given function:

f(x)=6/(2-x) c=1

I am stumped on this one. I've tried for an hour on this one with no luck. Could someone help?
 
Physics news on Phys.org
Write it as 6\left(\frac{1}{2-x}\right). You have to get rid of the 2 so write it as follows:

6\left(\frac{1}{2(1-\frac{x}{2})}\right) \rightarrow 3\left(\frac{1}{1-\frac{x}{2}}\right)
 
Last edited:
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
Back
Top