Power series, simple question

  • #1

Homework Statement


My question involves a small algebra issue within a power series problem. I have (-1)^n-1 and i just need to know how i can re-write this. I know that if it were (1)^n+1 i could re-write as (1)^n * (n)
So can i write (-1)^n-1 as (-1)^n * (-1) ?


Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
352
0
To answer this, think about what [tex](-1)^{-1}[/tex] is.
 
  • #3
275
0
(-1)^n-1 = [(-1)^n]/(-1)
 

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