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Re: [obm-l] Desigualdade
- To: obm-l@xxxxxxxxxxxxxx
- Subject: Re: [obm-l] Desigualdade
- From: "saulo nilson" <saulo.nilson@xxxxxxxxx>
- Date: Tue, 21 Aug 2007 16:23:16 -0300
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f(b)=a/b+b/a
f´(b)=-a/b^2+1/a=0
b=+-1
f´´(b)=-2/b^3
da mesma maneira
a=+-1 estremos
fmax=-1/-1-1/-1=2
a/b+b/a>=2
ou
a/b+b/a=(a-b)^2/ab+2
que tem um minimo em a=b
On 8/20/07, Bruna Carvalho <bruna.carvalho.pink@gmail.com> wrote:
Demonstrar a seguinte desilgualdade
a/b + b/a ≥ 2, para todo a e b real não nulo.
--
Bjos,
Bruna