- #1
PhysicsBoyMan
- 33
- 0
Homework Statement
x(cnxn-1)
3. The Attempt at a Solution
I know that the answer is cnxn
I'm not sure why though. My thinking is that we have cnxn-1 and we multiply that by x. x times x is x2 so I'm expecting a 2 to interact with the n-1 in the exponents. I'm just not sure how n-1 interacts with 2 to produce n.
I don't add n-1 + 2 to get n + 1 because I already have the answer and its not that. I just can't see how I would get from n-1 to n by interacting with a 2.
Thanks for the help.