<s>[INST] show that if $a,b,c \in \mathbb{R}^+$ show that if $a,b,c \in \mathbb{R}^+$ different from zero, then:
$$(a^2+b^2+c^2)\cdot\left(\frac{1}{a^2}+\frac{1}{b^2}+\frac{1}{c^2}\right)\leq(a+b+c)\cdot\left(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\right)$$ 
I had no success in my attempts
 [/INST] $a=2012,b=c=1$.
Any other large number should work instead of $2012$.
If the inequality is reversed, just multiply and prove the following simple Lemma:
Lemma $f(x) =x+ \frac{1}{x}$ is increasing on $[1, \infty)$. In particular, for all $x\geq 1$ we have 
$$f(x^2) \geq f(x) \,.$$
P.S. Maybe even simpler
$$\frac{a}{b}+\frac{b}{a} \geq 2 \Rightarrow \frac{a^2}{b^2}+\frac{b^2}{a^2}-\frac{a}{b}+\frac{b}{a}=(\frac{a}{b}+\frac{b}{a})^2-2-(\frac{a}{b}+\frac{b}{a}) \geq  2(\frac{a}{b}+\frac{b}{a} )-2-(\frac{a}{b}+\frac{b}{a}) \geq 0 $$
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