推 lateas:orz 218.164.45.39 11/02
推 darkseer:thx 難怪我自己po的時候就覺得怪怪的... 220.143.121.62 11/02
推 pikahacker:其實可以用cost,但意思不太一樣 XD 128.12.47.33 11/03
※ 引述《darkseer (進入無限期公假)》之銘言：
: 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...
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
It can't "cost" you more than two hours.
It "took" you more than two hours.
money 用 cost
time 用 take
雖然我知道這不是重點
不過文法還是要注意
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