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<p class="MsoNormal"><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">有</span><span lang="ZH-CN" style="font-family: SimSun;">这样</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">一个</span><span lang="ZH-CN" style="font-family: SimSun;">问题</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">，望各位大</span><span lang="ZH-CN" style="font-family: SimSun;">虾</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">解答</span><span lang="EN-US"><br/>
</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">在一个村子里有</span><span lang="EN-US">n</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">各村民，村民</span><span lang="ZH-CN" style="font-family: SimSun;">每</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">人都</span><span lang="ZH-CN" style="font-family: SimSun;">养</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">自己的羊。村民任何人都可以在公共的牧</span><span lang="ZH-CN" style="font-family: SimSun;">场</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">放羊。村民</span><span lang="EN-US">i(i=1,..,n)</span><span lang="ZH-CN" style="font-family: SimSun;">饲养</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">的羊的数量是</span><span lang="EN-US">mi</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">，，整个村子的羊是</span><span lang="EN-US">
M=m1+m2+...+mn)</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">。村子的羊的数量少的</span><span lang="ZH-CN" style="font-family: SimSun;">时</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">候村民可以在牧</span><span lang="ZH-CN" style="font-family: SimSun;">场让</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">羊吃</span><span lang="ZH-CN" style="font-family: SimSun;">饱</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">，羊的数量增加以后牧草的量</span><span lang="ZH-CN" style="font-family: SimSun;">开</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">始急</span><span lang="ZH-CN" style="font-family: SimSun;">剧</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">减少，超</span><span lang="ZH-CN" style="font-family: SimSun;">过</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">某一限度</span><span lang="EN-US">M#</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">的</span><span lang="ZH-CN" style="font-family: SimSun;">时</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">候牧草就</span><span lang="ZH-CN">
                </span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">会消失。村民</span><span lang="ZH-CN" style="font-family: SimSun;">养</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">一</span><span lang="ZH-CN" style="font-family: SimSun;">头</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">羊所得到的收入</span><span lang="ZH-CN" style="font-family: SimSun;">设为</span><span lang="EN-US">v</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">，</span><span lang="ZH-CN" style="font-family: SimSun;">饲养</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">一</span><span lang="ZH-CN" style="font-family: SimSun;">头</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">羊的成本</span><span lang="ZH-CN" style="font-family: SimSun;">为</span><span lang="EN-US">c<br/>
</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">在</span><span lang="ZH-CN" style="font-family: SimSun;">这种</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">情况下，</span><span lang="EN-US" style="font-family: "ＭＳ 明朝";"><op></op></span></p>

<p class="MsoNormal"><span lang="ZH-CN" style="font-family: SimSun;">问</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">：</span><span lang="EN-US">1. </span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">考</span><span lang="ZH-CN" style="font-family: SimSun;">虑对</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">于村民</span><span lang="EN-US">i</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">来</span><span lang="ZH-CN" style="font-family: SimSun;">说饲养</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">几</span><span lang="ZH-CN" style="font-family: SimSun;">头</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">羊最适合</span><span lang="ZH-CN">
                </span><span lang="EN-US"><op></op></span></p>

<p class="MsoNormal"><span lang="EN-US">A)</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">当村民只</span><span lang="ZH-CN" style="font-family: SimSun;">养</span><span lang="EN-US">mi</span><span lang="ZH-CN" style="font-family: SimSun;">头</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">羊的利益的式是什</span><span lang="ZH-CN" style="font-family: SimSun;">么</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">？</span><span lang="EN-US"><op></op></span></p>

<p class="MsoNormal"><span lang="EN-US">B)</span><span lang="ZH-CN" style="font-family: SimSun;">列出</span><span lang="ZH-CN" style="font-family: SimSun;">关于</span><span lang="EN-US">mi</span><span lang="ZH-CN" style="font-family: SimSun;">条件的式子</span><span lang="EN-US"><op></op></span></p>

<p class="MsoNormal"><span lang="EN-US"><span> </span><span> </span><span> </span><span> </span><span> </span>2</span><span lang="ZH-CN" style="font-family: SimSun;">．将村子视为整个社会，对于这个社会来说考虑饲养几头羊最合适</span><span lang="EN-US"><op></op></span></p>

<p class="MsoNormal"><span lang="EN-US">A)</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">当</span><span lang="ZH-CN" style="font-family: SimSun;">整个</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">村</span><span lang="ZH-CN" style="font-family: SimSun;">子</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">只</span><span lang="ZH-CN" style="font-family: SimSun;">养</span><span lang="EN-US">M</span><span lang="ZH-CN" style="font-family: SimSun;">头</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">羊的利益的式是什</span><span lang="ZH-CN" style="font-family: SimSun;">么</span><span lang="ZH-CN" style="font-family: "ＭＳ 明朝";">？</span><span lang="EN-US"><op></op></span></p>

<p class="MsoNormal"><span lang="EN-US">B)</span><span lang="ZH-CN" style="font-family: SimSun;">列出</span><span lang="ZH-CN" style="font-family: SimSun;">关于</span><span lang="EN-US">M</span><span lang="ZH-CN" style="font-family: SimSun;">条件的式子</span><span lang="EN-US"><op></op></span></p>

<p class="MsoNormal"><span lang="ZH-CN" style="font-family: SimSun;">比较上面</span><span lang="EN-US">1</span><span lang="ZH-CN" style="font-family: SimSun;">，</span><span lang="EN-US">2</span><span lang="ZH-CN" style="font-family: SimSun;">的答案，解释你能发现什么</span></p><p class="MsoNormal"><br/></p><p class="MsoNormal">日本京都大学一道考试问题，小弟实在是不知道从哪里下手，望各位解答</p><p class="MsoNormal">谢谢！<br/><span lang="ZH-CN" style="font-family: SimSun;"></span><span lang="EN-US"><op></op></span></p>

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关键词：DEFINITIONS definition signature Variable Generic

1.y=mi(v-c)其中mi(0,M#)

2.y=M(v-c)其中M(0,M#)

抛砖引玉，期待高手解答。

没想到沉得这么快，谢谢2楼的解答
剩下的问题还有没有人来解答啊？