Cho $a, b, c \in R^{+}$ thoả $ a+ b+ c= 1$. CMR:
$a\sqrt{1- bc}+ b\sqrt{1- ca}+ c\sqrt{1- ab}\geq \sqrt{\frac{23}{24}- \frac{15abc}{8}}$
Cho $a, b, c \in R^{+}$ thoả $ a+ b+ c= 1$. CMR:
$a\sqrt{1- bc}+ b\sqrt{1- ca}+ c\sqrt{1- ab}\geq \sqrt{\frac{23}{24}- \frac{15abc}{8}}$
Cho $a, b, c \in R^{+}$ thoả $ a+ b+ c= 1$ thì:
$$a\sqrt{1- bc}+ b\sqrt{1- ca}+ c\sqrt{1- ab}\geqq \sqrt{\frac{23}{24}- \frac{15\,abc}{8}}$$
[giá trị tốt nhất]
$$\text{VP}_{^{st}}= \sqrt{\frac{323}{324}- \frac{35\,abc}{12}}$$
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