Re: Wrong partial derivatives calculated
- To: mathgroup at smc.vnet.net
- Subject: [mg41181] Re: Wrong partial derivatives calculated
- From: "Bill Bertram" <wkb at ansto.gov.au>
- Date: Tue, 6 May 2003 06:05:05 -0400 (EDT)
- Organization: Australian Nuclear Science and Technology Organisation
- References: <b9514r$r86$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"David" <david at hushmail.com> wrote in message news:b9514r$r86$1 at smc.vnet.net... > 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. > David, xy is not the same as x*y !