Re: Quintic
- To: mathgroup at smc.vnet.net
- Subject: [mg38546] Re: Quintic
- From: "PSi" <psinome at tee.gr>
- Date: Wed, 25 Dec 2002 03:12:48 -0500 (EST)
- References: <atup01$k5v$1@smc.vnet.net> <au9h57$ps7$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"Ottem" <christian_ottem at yahoo.no> wrote in message news:au9h57$ps7$1 at smc.vnet.net... > "PSi" <psinome at tee.gr> wrote in message news:<atup01$k5v$1 at smc.vnet.net>... > > According to > > http://library.wolfram.com/examples/quintic/main.html > > one of the roots of x^5+20x+32=0 is > > a = (1/5)(-(2500 5^(1/2) + 250(50 - 10 5^(1/2))^(1/2) - > > 750(50 + 10 5^(1/2))^(1/2))^(1/5) > > - (-2500 5^(1/2) + 750(50 - 10 5^(1/2))^(1/2) + > > 250(50 + 10 5^(1/2))^(1/2))^(1/5) > > - (2500 5^(1/2) + 750(50 - 10 5^(1/2))^(1/2) + > > 250(50 + 10 5^(1/2))^(1/2))^(1/5) > > - (2500 5^(1/2) - 250(50 - 10 5^(1/2))^(1/2) + > > 750(50 + 10 5^(1/2))^(1/2))^(1/5)) > > According to Mathematica 4.1 this is not a root of the above equation. > > Is there somewhere a typo? > > Yes. Where exactly? > > > Thanks, PSi > > No Problem. > > C >