数学试题讨论稿第八篇（239--278）
<p> 239. 直角三角形三边<span word="X">X</span>〈 <span word="Y">Y</span> 〈 <span word="Z">Z</span>，面积为1， 问<span word="Y">Y</span>所有可能取值的范围</p><p> <span word="ANS">ANS</span>： <span word="Y">Y</span>〉根号2</p><p> 解： <span word="XY">XY</span>=2，<span word="YX">YX</span>, 所以<span word="Y">Y</span>22</p><p> 240. 摄氏华氏温度转换那道见以前<span word="JJ">JJ</span> <span word="answer">answer</span>: <span word="D">D</span></p><p> 同40,191题, 241. 一个公司卖大号和中号的白色红色<span word="T">T</span>恤， 其中大号红色是中号白色的3倍，中号红色是大号白色的2倍， 一共卖了80件红色和190件白色 问中号<span word="T">T</span>恤卖了多少件?</p><p> 答案 200</p><p> 同46,80,197,本月高频题</p><p> <span word="lr">lr</span>=<span word="x">x</span> <span word="lw">lw</span>=<span word="y">y</span> <span word="then">then</span> <span word="mr">mr</span>=2<span word="y">y</span>, <span word="mw">mw</span>=3<span word="x">x</span></p><p> <span word="x">x</span>+2<span word="y">y</span>=80 <span word="y">y</span>+3<span word="x">x</span>=190 所求=2<span word="y">y</span>+3<span word="x">x</span>=200</p><p> 242. 25=1,<span word="N">N</span>是多少? <span word="N">N</span>= -2</p><p> 243. 等比数列，1/2，1/4，1/8，1/16。。。。问第十项<span word="X">X</span>是?选0.0001~0.001</p><p> 第十项是1/210 =1/1024</p><p> 244. 1.坐标，，，，那个正方形占圆形的面积</p><p> 同20,192. 坐标系上一个正方形范围,过,,,,求一个方程<span word="x">x</span>^2+<span word="y">y</span>^21的<span word="PROBABILITY">PROBABILITY</span> <span word="answer">answer</span>: <span word="pai">pai</span> / 4</p><p> 245. <span word="N">N</span>是多少? 1)<span word="N">N</span> <span word="divided">divided</span> <span word="by">by</span> 3 <span word="and">and</span> <span word="the">the</span> <span word="remainder">remainder</span> <span word="is">is</span> 2. 2)<span word="N">N</span>^2<span word="divided">divided</span> <span word="by">by</span> 3, <span word="and">and</span> <span word="the">the</span> <span word="remainder">remainder</span> <span word="is">is</span> 1.差不多是这样，我选了<span word="E">E</span>的</p><p> 246. 哪个<span word="GWD">GWD</span>上20部电话占总家庭人数：答案75/250=3/10</p><p> <span word="GMAT">GMAT</span>白骨精<span word="MM">MM</span>对246的补充:</p><p> 倒是很像8月<span word="JJ">JJ</span>566就是说由用户250，然后根据用户的收入家里的电话数不同，列了个表，问得是，随便选个用户，家里有两部电话的可能</p>
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