Re: Question about an integral
- To: mathgroup at smc.vnet.net
- Subject: [mg54399] Re: Question about an integral
- From: Peter Pein <petsie at arcor.de>
- Date: Sun, 20 Feb 2005 00:07:57 -0500 (EST)
- References: <cv6ssi$6qb$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
richard speers wrote:
> The previous version of Mathematica integrated 1/x^2 from x=2 to x=A
> very nicely, giving 1/2-1/A. The new
> version won't do the integral. Please help.
>
You must not integrate over the origin. So either the real part of A has
to be greater than zero or the imaginary part of A must not vanish:
Integrate[1/x^2,{x,2,A},Assumptions-> Re[A]>0 || Im[A]!=0]
--
Peter Pein
Berlin