运筹学的题，作出我请客，呵呵
<h3 style="MARGIN: 3pt 0cm;"><font size="3"><font face="宋体"><span style="mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">运筹学的题，比较难，这是其中较简单的一个，请高手出马一试！</span></font></font></h3><h3 style="MARGIN: 3pt 0cm;"><font size="3"><font face="宋体"><span style="mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">购车问题</span><span lang="EN-US" style="FONT-FAMILY: 'Times New Roman';"><p></p></span></font></font></h3><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0;"><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">Tom</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">大学毕业后刚取得汽车驾驶执照，对</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">SKY05</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">型小汽车情有独钟。准备第</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">年年初买一辆使用了</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">年的</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">SKY05</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">型二手车，价格为</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">7.12</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">万元。</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">年后可以继续使用该车，也可以卖掉购买同一品牌的新车，不再购买二手车。通过市场调查和预测，得到有关资料。</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">（</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">）该车第</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">年初的价格为</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">10</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">万元，以后逐年降价，第</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">年到第</span><span lang="EN-US" style="mso-hansi-font-family: 宋体;"><font face="Times New Roman">5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman';">年的的降价幅度分别为</span><span lang="EN-US"><font face="Times New Roman">4</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">％、</span><span lang="EN-US"><font face="Times New Roman">5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">％、</span><span lang="EN-US"><font face="Times New Roman">7%</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">、</span><span lang="EN-US"><font face="Times New Roman">5%</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">。第</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">t</font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">年的价格记为</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">P<sub>t</sub></font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">，</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">t</font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">＝</span><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">，</span><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">，…。</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">（</span><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">）购新车必须支付</span><span lang="EN-US"><font face="Times New Roman">10%</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">的各项税费。购置费用记为</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">C<sub>t</sub></font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">，</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">C<sub>t</sub></font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">＝</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1.1" unitname="pt"><span lang="EN-US"><font face="Times New Roman">1.1<i style="mso-bidi-font-style: normal;">P<sub>t</sub></i></font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">。</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">（</span><span lang="EN-US"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">）该车第</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">t</font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">年的维护费用</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">M<sub>t</sub></font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">是使用年限</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">t</font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">的函数，</span><i style="mso-bidi-font-style: normal;"><span lang="EN-US"><font face="Times New Roman">M<sub>t</sub></font></span></i><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">＝</span><font face="Times New Roman"><span lang="EN-US">0.4<i style="mso-bidi-font-style: normal;">t</i></span><sup><span lang="EN-US" style="FONT-SIZE: 12pt;">1.3</span></sup></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">。</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">（</span><span lang="EN-US"><font face="Times New Roman">4</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">）汽车年折旧率为</span><span lang="EN-US"><font face="Times New Roman">15</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">％，汽车残值为：</span><span lang="EN-US"><font face="Times New Roman">B<i style="mso-bidi-font-style: normal;"><sub>t</sub></i></font></span><i style="mso-bidi-font-style: normal;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">＝</span></i><span lang="EN-US"><font face="Times New Roman">0.85<i style="mso-bidi-font-style: normal;"><sup> t</sup>P<sub>t</sub></i></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">。</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">无论第</span><span lang="EN-US"><font face="Times New Roman">5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">年末更新或不更新，将汽车残值从总成本中减去，等价于将车卖掉。</span><span lang="EN-US"><font face="Times New Roman">Tom</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">如何制定一个</span><span lang="EN-US"><font face="Times New Roman">5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">年的购车方案使</span><span lang="EN-US"><font face="Times New Roman">5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">年的总成本最低</span><span lang="EN-US"><font face="Times New Roman">(</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">不计其它成本</span><span lang="EN-US"><font face="Times New Roman">)</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">。</span></p> <p>动态规划问题，我好像就给学生出过类似的问题，参考书上的例子应该求解差不多！</p>谢谢
老师能帮忙给解决一下么，我搞不定，现在很急啊，一共三道题呢，要是您能帮忙搞定，我们绝对可以请客的！呵呵！ 很简单的嘛 <p>这个题目谁做好了阿?哪来参考一下阿 </p> 题目错了吧，应该ct=0.1pt 1# szt5674472 还要扣钱啊
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