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xuan_nam


Cho $a;b;c \in R^+$. Tìm $Max$:
$M = \sqrt{\dfrac{a}{b + c + 2a}} + \sqrt{\dfrac{b}{c + a + 2b}} + \sqrt{\dfrac{c}{a + b + 2c}}$
$M = \sqrt{\dfrac{a}{b + c + 2a}} + \sqrt{\dfrac{b}{c + a + 2b}} + \sqrt{\dfrac{c}{a + b + 2c}}$