Re: Root again

*To*: mathgroup at smc.vnet.net*Subject*: [mg109048] Re: Root again*From*: Peter Pein <petsie at dordos.net>*Date*: Mon, 12 Apr 2010 06:50:47 -0400 (EDT)*References*: <hppl9h$m0n$1@smc.vnet.net> <hps1dp$6jd$1@smc.vnet.net>

Am 11.04.2010 10:31, schrieb Maxim: ... > Peter > > I don't know how to do it without using this small trick, but it's > possible to solve such problems symbolically: > > In[1]:= Reduce[ > Root[1 + t # + #^6&, 2]< 0 || Root[1 + t # + #^6&, 2]>= 0, t] > > Out[1]= t<= Root[-46656 + 3125 #1^6&, 1] || t>= Root[-46656 + 3125 > #1^6&, 2] > > Maxim Rytin > m.r at inbox.ru > Thank you Maxim, this is really simple ;-) but it does not give a hint what "NumericalFunction" is. Maybe someone of the Mathematica team could give an answer?