作者whalelover (鯨魚狂)
看板SENIORHIGH
標題Re: [請益] 一題成大數學考古題!!
時間Mon Mar 28 23:35:09 2011
令三段長x,y,1-x-y {(x,y)丨0<x,y<1且x+y<1}
〔x+y>(1-x-y) 〔x+y>1/2
〔x+(1-x-y)>y => 〔y<1/2
〔y+(1-x-y)>x 〔x<1/2
畫圖 #
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