AMX
Posts:
35
Registered:
8/22/09


Re: lowerbound quadratic on two other quadratics
Posted:
Jul 12, 2012 8:44 AM


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)
AMX
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