Chemical Forums
Specialty Chemistry Forums => Other Sciences Question Forum => Topic started by: Corribus on November 01, 2018, 02:06:48 PM

Can anyone figure out a simple expression for the following series of terms (n starting at 0 or 1)? I would like to express as a summation of terms.
x, 2x, 2+x, 4x, 4+x, 6x, 6+x, .
? I can't think of one. Obviously I could break it into two summations but that becomes cumbersome.
Cyberbeer to whoever comes up with something. :)

I get to buy myself a beer. I had to use a few trigonometric functions. My expression is pretty ugly and could probably be simplified but I'm too tired.

Would this fit your needs?
n+0.5+(1)^{n}(x0.5)
starts giving x for n=0.
(1)^{n} could be cos(n×π) if any better.