Re: Wrong partial derivatives calculated
- To: mathgroup at smc.vnet.net
- Subject: [mg41180] Re: Wrong partial derivatives calculated
- From: "Lawrence A. Walker Jr." <lwalker701 at earthlink.net>
- Date: Tue, 6 May 2003 06:04:45 -0400 (EDT)
- References: <b9514r$r86$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi David, Just put a space between 'xy' or use '*' so that Mathmatica can recognize that you intend to multiply instead x and y. Lawrence David wrote: > When I calculate (D[x^2 + xy + y^2, x) mathematica gives me 2y and when I > calculate D[x^2 + xy + y^2, y) I get 2x. These are wrong answers -- have I > got the syntax right? I'm trying to find partial derivatives of x^2 + xy + > y^2 with respect to x and y. > > Thanks, > > David > > > -- Lawrence A. Walker Jr. http://www.kingshonor.com