Cho $a,b,c\geq 0$ thỏa $a^2+b^2+c^2=3$. CMR:
$$\frac{a}{(4-b)(b+2)}+\frac{b}{(4-c)(c+2)}+\frac{c}{(4-a)(a+2)}\leq 3$$
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Edited by HoangHungChelski, 10-09-2014 - 18:55.
$\frac{a}{(4-b)(b+2)}+\frac{b}{(4-c)(c+2)}+\frac{c}{(4-a)(a+2)}\leq 3$
Started By HoangHungChelski, 10-09-2014 - 18:55
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Posted 10-09-2014 - 18:55
HoangHungChelski
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