Re: Question about an integral
- To: mathgroup at smc.vnet.net
- Subject: [mg54577] Re: Question about an integral
- From: dh <dh at metrohm.ch>
- Date: Wed, 23 Feb 2005 03:11:52 -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.
>
If A <0 your answer is wrong! The integral does diverge. You are
assuming that A>2. So simply tell this to Mathematica and you get the
right answer:
Integrate[1/x^2, {x, 2, A}, Assumptions -> A > 2] gives: 1/2-1/A
Sincerely, Daniel