<span lang="EN-US" twffan="done" style="; FONT-FAMILY: "Times New Roman"; mso-bidi-; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><p>a<=1,b<=1</p><p>[(8a<sup>2</sup>b<sup>2</sup>)/(a+b)<sup>3</sup>]<sup>0.5</sup></p><p>上式的最大值为多少呢？</p><p>搞了一下午，搞不明白了，请大家帮忙<shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" coordsize="21600,21600" ospt="75" opreferrelative="t"></shapetype><stroke joinstyle="miter"></stroke><stroke></stroke><formulas></formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f></f><f eqn="sum @0 1 0"></f><f></f><f eqn="sum 0 0 @1"></f><f></f><f eqn="prod @2 1 2"></f><f></f><f eqn="prod @3 21600 pixelWidth"></f><f></f><f eqn="prod @3 21600 pixelHeight"></f><f></f><f eqn="sum @0 0 1"></f><f></f><f eqn="prod @6 1 2"></f><f></f><f eqn="prod @7 21600 pixelWidth"></f><f></f><f eqn="sum @8 21600 0"></f><f></f><f eqn="prod @7 21600 pixelHeight"></f><f></f><f eqn="sum @10 21600 0"></f><f></f><formulas></formulas><path gradientshapeok="t" oextrusionok="f" oconnecttype="rect"></path><path></path><lock aspectratio="t" vext="edit"></lock><lock></lock><shapetype></shapetype><shape id="_x0000_i1025" type="#_x0000_t75" oole="" style="WIDTH: 260.25pt; HEIGHT: 47.25pt;"></shape><imagedata src="file:///C:\DOCUME~1\admin\LOCALS~1\Temp\msohtml1\01\clip_image001.wmz" otitle=""></imagedata><imagedata></imagedata><shape></shape></p></span>

[此贴子已经被作者于2007-12-31 16:39:53编辑过]