NSum bug or am I doing something wrong?
- To: mathgroup at smc.vnet.net
- Subject: [mg93869] NSum bug or am I doing something wrong?
- From: "Ebpr Preb" <ebpr08 at gmail.com>
- Date: Thu, 27 Nov 2008 05:33:00 -0500 (EST)
Hi,
I'm getting imaginary answers for simple NSums of rational numbers. The
example below produces the issue in Mathematica 7:
NSum[(-1)^(k + 1)*(.2)^k, {k, 1, 32}]
gives me the result:
0.166667 + 1.1972*10^-44 I
When I switch to Sum the problem disappears.
Any hint?
Thanks so much.
ebpr