由柯西不等式:
(a/(b+1)+b/(c+1)+c/(a+1))(b+1+c+1+a+1)>=(a+b+c)^2
即 (a/(b+1)+b/(c+1)+c/(a+1))*6>=3^2
所以原不等式成立,易得,等號當且僅當a=b=c時成立
由柯西不等式:
(a/(b+1)+b/(c+1)+c/(a+1))(b+1+c+1+a+1)>=(a+b+c)^2
即 (a/(b+1)+b/(c+1)+c/(a+1))*6>=3^2
所以原不等式成立,易得,等號當且僅當a=b=c時成立
• 好!再接再勵!又請AI生成了兩個。看來AI是按固定的思路出題的。 -wxcfan123- ♂ (81 bytes) () 01/14/2024 postreply 13:06:45
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