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AMX
Posts:
35
Registered:
8/22/09


Re: lowerbound quadratic on two other quadratics
Posted:
Jul 13, 2012 2:27 AM


On Thu, 12 Jul 2012 12:44:27 +0000 (UTC), AMX <rznk@b2.cy> wrote: > On Mon, 9 Jul 2012 15:12:44 0700 (PDT), Armand ><armandprie@gmail.com> wrote: > >> >> Given two positive quadratic functions a1x^2 + b1x + c1 and >> a2x^2 + b2x + c2, find a third quadratic function which is a >> "greatest" lowerbound on both these two functions. >> > > Try: > > 1. Order your functions that a1>=a2 > 2. compute t=(b2b1)^2/(4*(a2a1))c1 > 3. sought y=ax^2+bx+c is such that a=a1, b=b1, c=min(c1,t) >
Does not work for a1=a2 and b1!=b2.
 adres w rot13 Nyrxfnaqre Znghfmnx rznk@b2.cy



