Cho $1\leq a, b, c\leq 2$. Chứng minh $\left ( a+ b+ c \right )\left ( \frac{1}{a}+ \frac{1}{b}+ \frac{1}{c} \right )\leq 10$
$\left ( a+ b+ c \right )\left ( \frac{1}{a}+ \frac{1}{b}+ \frac{1}{c} \right )\leq 10$
Started By dai101001000, 30-03-2018 - 20:18
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Posted 30-03-2018 - 20:18
dai101001000
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#2
Posted 30-03-2018 - 20:21
buingoctu
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Cho $1\leq a, b, c\leq 2$. Chứng minh $\left ( a+ b+ c \right )\left ( \frac{1}{a}+ \frac{1}{b}+ \frac{1}{c} \right )\leq 10$
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Posted 31-03-2018 - 07:53
DOTOANNANG
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