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[DOTOANNANG]

@HaiDangel  /   $a,b,c$ $>$ $0$, chứng minh rằng:

$$(abc+a+b+c)^{3}\geq 8abc(1+a)(1+b)(1+c)$$

 

[DOTOANNANG]

$a,b,c$ $>$ $0$, chứng minh rằng:

$$(1+ab+bc+ca)^{3}\geq 8abc(1+a)(1+b)(1+c)$$

[DOTOANNANG]

$\lceil$ Michael Rozenberg $\rfloor$