作者darkseer (进入无限期公假)
看板IMO_Taiwan
标题[问题] 两个变数的不等式
时间Tue Nov 2 11:15:40 2004
Source:Mathlink
Let a,b be arbitrary positive reals. Show that
1 1 1
----------- + ----------- >= ------------
1+a+a^2+a^3 1+b+b^2+b^3 1+(ab)^(3/2)
How can an inequality with only two variables be so hard?
It costs me more than two hours...
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 163.32.78.42