论坛 › LINDO\LINGO论坛 › 新人求助，如何用lingo解决投资决策问题？

lizzieliu 发表于 2008-8-4 18:36

新人求助，如何用lingo解决投资决策问题？

我实在是不会做这道题，所以来求救了<br/>题目是这样：

<p class="MsoNormal" style="text-indent: 24pt; line-height: 150%;"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">假设市场上有</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">m</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">种资产（如股票、证券等），某资产投资公司计划用一笔数额为</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">N</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">的资金进行一个时期的投资。</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">公司财务分析人员对这</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">m</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">种资产进行了评估和分析，可供投资的资产以及其信用等级、到期年限、收益如下表所示。按照规定，甲类资产的收益按<span lang="EN-US">20%</span>的税率纳税，其它资产的收益按<span lang="EN-US">50%</span>的税率纳税，此外还要求：<span lang="EN-US"><o:p></o:p></span></span></p>

<p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;" lang="EN-US"><span style="">（1）<span style="font-family: &quot;Times New="New"  Roman&quot;; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">&nbsp;&nbsp;&nbsp; </span></span></span><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">种类为乙、丙和丁的资产总共至少要投资<span lang="EN-US">450</span>万元；<span lang="EN-US"><o:p></o:p></span></span></p>

<p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><!----><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><span style="">（2）<span style="font-family: &quot;Times New="New"  Roman&quot;; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">&nbsp;&nbsp;&nbsp;
</span></span></span><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">所投资的资产的平均信用等级不超过<span lang="EN-US">1.5</span>（信用等级数值越少，信用程度越高）；</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><!----><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><span style="">（3）<span style="font-family: &quot;Times New="New"  Roman&quot;; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">&nbsp;&nbsp;&nbsp;
</span></span></span><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">所投资资产的平均到期年限不超过<span lang="EN-US">5</span>年；</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;" lang="EN-US"><span style="">（4）<span style="font-family: &quot;Times New="New"  Roman&quot;; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">&nbsp;&nbsp;&nbsp; </span></span></span><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">假定同期银行存款利率是<span lang="EN-US"><span style="position: relative; top: 6pt;"><!--><v:shapetype id="_x0000_t75"
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<o:OLEObject type="Embed" progid="Equation.3" shapeid="_x0000_i1026"
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</xml><!-->=5%</span>）<span lang="EN-US">.<o:p></o:p></span></span></p>

<div align="center">

<table class="MsoTableGrid" style="border: medium="medium"  none="none"  ; border-collapse: collapse;" border="1" cellpadding="0" cellspacing="0">
<tbody><tr style="">
  <td style="border: 1pt="1pt"  solid="solid"  windowtext; padding: 0cm="0cm"  5.4pt; width: 77.4pt;" width="103">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">资产名称</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: solid="solid"  solid="solid"  solid="solid"  none; border-color: windowtext="windowtext"  windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: 1pt="1pt"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">资产种类</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: solid="solid"  solid="solid"  solid="solid"  none; border-color: windowtext="windowtext"  windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: 1pt="1pt"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 81pt;" width="108">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">信用等级</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: solid="solid"  solid="solid"  solid="solid"  none; border-color: windowtext="windowtext"  windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: 1pt="1pt"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">到期年限</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: solid="solid"  solid="solid"  solid="solid"  none; border-color: windowtext="windowtext"  windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: 1pt="1pt"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 123.7pt;" width="165">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">到期税前收益（</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">%</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">）</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
</tr>
<tr style="">
  <td style="border-style: none="none"  solid="solid"  solid; border-color: -moz-use-text-color windowtext="windowtext"  windowtext; border-width: medium="medium"  1pt="1pt"  1pt; padding: 0cm="0cm"  5.4pt; width: 77.4pt;" width="103">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">A<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">甲</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 81pt;" width="108">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">2<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">9<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 123.7pt;" width="165">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">4.3<o:p></o:p></span></p>
  </td>
</tr>
<tr style="">
  <td style="border-style: none="none"  solid="solid"  solid; border-color: -moz-use-text-color windowtext="windowtext"  windowtext; border-width: medium="medium"  1pt="1pt"  1pt; padding: 0cm="0cm"  5.4pt; width: 77.4pt;" width="103">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">B<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">乙</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 81pt;" width="108">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">2<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">14<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 123.7pt;" width="165">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">5.5<o:p></o:p></span></p>
  </td>
</tr>
<tr style="">
  <td style="border-style: none="none"  solid="solid"  solid; border-color: -moz-use-text-color windowtext="windowtext"  windowtext; border-width: medium="medium"  1pt="1pt"  1pt; padding: 0cm="0cm"  5.4pt; width: 77.4pt;" width="103">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">C<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">丙</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 81pt;" width="108">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">1<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">4<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 123.7pt;" width="165">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">5.0<o:p></o:p></span></p>
  </td>
</tr>
<tr style="">
  <td style="border-style: none="none"  solid="solid"  solid; border-color: -moz-use-text-color windowtext="windowtext"  windowtext; border-width: medium="medium"  1pt="1pt"  1pt; padding: 0cm="0cm"  5.4pt; width: 77.4pt;" width="103">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">D<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">甲</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 81pt;" width="108">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">5<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">2<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 123.7pt;" width="165">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">4.5<o:p></o:p></span></p>
  </td>
</tr>
<tr style="">
  <td style="border-style: none="none"  solid="solid"  solid; border-color: -moz-use-text-color windowtext="windowtext"  windowtext; border-width: medium="medium"  1pt="1pt"  1pt; padding: 0cm="0cm"  5.4pt; width: 77.4pt;" width="103">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">E<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">丁</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 81pt;" width="108">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">4<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 72pt;" width="96">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">3<o:p></o:p></span></p>
  </td>
  <td style="border-style: none="none"  solid="solid"  solid="solid"  none; border-color: -moz-use-text-color windowtext="windowtext"  windowtext="windowtext"  -moz-use-text-color; border-width: medium="medium"  1pt="1pt"  1pt="1pt"  medium; padding: 0cm="0cm"  5.4pt; width: 123.7pt;" width="165">
  <p class="MsoNormal" style="text-align: center; line-height: 150%;" align="center"><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">5.6<o:p></o:p></span></p>
  </td>
</tr>
</tbody></table>

</div>

<p class="MsoNormal" style="line-height: 150%;"><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">现在需讨论以下问题：</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><!----><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><span style="">（1）<span style="font-family: &quot;Times New="New"  Roman&quot;; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">&nbsp;&nbsp;&nbsp;
</span></span></span><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">若该公司有</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">2000</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">万元现金，应如何投资？</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><!----><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><span style="">（2）<span style="font-family: &quot;Times New="New"  Roman&quot;; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">&nbsp;&nbsp;&nbsp;
</span></span></span><!----><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">如果该公式能够以</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">2.7%</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">的利率借到不超过</span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US">150</span><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">万元资金，该公司是否借贷。</span></p><p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><br/></p><p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;">

</p><br/><p class="MsoNormal" style="margin-left: 36pt; text-indent: -36pt; line-height: 150%;"><br/><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;"></span><span style="font-size: 12pt; line-height: 150%;" lang="EN-US"><o:p></o:p></span></p>

a3057579 发表于 2009-8-6 14:35

的身份尽快建立卡时间浪费

心飞清山绿水 发表于 2009-8-22 10:58

model:
!x1,x2,x3,x4,x5,x6;
max=x1*0.043*0.8+x2*0.055*0.5+x3*0.05*0.5+x4*0.045*0.8+x5*0.056*0.5+0.005*x6;
x2+x3++x5>450;
x1+x2+x3+x4+x5+x6<2000;
(2*x1+2*x2+x3+5*x4+4*x5)/(x1+x2+x3+x4+x5)<1.5;
(9*x1+14*x2+4*x3+2*x4+3*x5)/(x1+x2+x3+x4+x5)<5;
f=(x1+x2+x3+x4+x5+x6);
end

查看完整版本: 新人求助，如何用lingo解决投资决策问题？