| Author |
Comment/Response |
Kvothe
|
 12/13/12 10:55am
Hello,
I'd like to assess the following expression:
1-2+5-...+-(2^n - n)
which should be presented as a "Sum".
Sum[f, {i=0,n}]
Now I thought about defining this expression:
it's MINUS for n = straight number
it's PLUS for n = odd number
F.e.:
n= 3 -> +(2^3 - 2) = +5
n=2 -> - (2^2 - 2) = -2
How can I do this? Or is there a simplier way?
URL: , |
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