09月数学试题讨论稿第六篇（154--186）
<p> 154.有一題是那個衛星繞著火星的那題 求衛星軌道的圓周 可是那題我算不出來 害我浪費了十分鐘 因為覺得都看過了卻怎麼算不出來 很不甘心 最後還是放棄了 </p><p> 同159.</p><p> 155. <span word="PQR">PQR</span>是个三角形, 问其中一角是多少?</p><p> 1) <span word="PQ">PQ</span>= 4 2) <span word="PQR">PQR</span>是<span word="equilateral">equilateral</span></p><p> 注： <span word="equilateral">equilateral</span>等边的</p><p> 同170.</p><p> 156. 我的最后一道是1+1/<span word="x">x</span>+ <span word="x">x</span>/<span word="x">x</span>^2 + <span word="x">x</span>^2/<span word="X">X</span>^3+ <span word="x">x</span>^3/<span word="X">X</span>^4= ? 具体条件不记得了,反正很简单的.</p><p> 157. 2^2-1/2^2=? 答案: 15/4</p><p> 158. <span word="x">x</span>,<span word="y">y</span>,<span word="z">z</span>,<span word="w">w</span>, <span word="x">x</span> <span word="is">is</span> 20% <span word="greater">greater</span> <span word="than">than</span> <span word="y">y</span>, <span word="y">y</span> <span word="is">is</span> 20% <span word="greater">greater</span> <span word="than">than</span> <span word="z">z</span>, <span word="w">w</span> <span word="is">is</span> 20% <span word="less">less</span> <span word="than">than</span> <span word="x">x</span>, <span word="how">how</span> <span word="much">much</span> <span word="percent">percent</span> <span word="greater">greater</span> <span word="than">than</span> <span word="z">z</span> <span word="is">is</span> <span word="w">w</span>? 答案: 15.2%</p><p> 解法: <span word="X">X</span>=1,<span word="Y">Y</span>=5/6,<span word="Z">Z</span>=25/36, <span word="W">W</span>=0.8, /<span word="Z">Z</span>=15.2%</p><p> 159. 火星的一个卫星离火星中心5800<span word="km">km</span>，表面3700，求火星周长。答案: 4200<span word="pai">pai</span></p><p> 解法: <span word="R">R</span>=2100, <span word="So">So</span>周长=4200<span word="Pai">Pai</span> 本月高频题!</p><p> 160. 一个六边形，一道斜线在六边形内切成另一个六边形，图标出了几个角<span word="x">x</span>和2<span word="x">x</span>、<span word="y">y</span>，问<span word="y">y</span>=?</p><p> 没有图，就说说解题吧。 六角和<span word="X">X</span>+2<span word="x">x</span>+2<span word="x">x</span>+2<span word="x">x</span>+3<span word="x">x</span>=540度，<span word="x">x</span>=54，3<span word="x">x</span>=162, <span word="y">y</span>=180-3<span word="x">x</span>=18</p><p> 原始题目不是很清楚,待补充</p><p> 161. 沙发800元，<span word="loveseat">loveseat</span> 300元，问数目?</p><p> 沙发和爱椅一共=3800 ; 沙发数目大于一个 ; <span word="Ans">Ans</span>: 由解出沙发=1或者4，所以选<span word="c">c</span></p>
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