第二届澳门中学生数学冬令营八年级数学试卷
日期:2010-01-15 01:40
N为直线OC,Q,d满足a-b=a2c-b2d,且圆O分别与线段BC,设a,PQ的交点,P,?试求所有可能的正整数n,FirstRoundofthe2ndMacauMathematicalOlympiadWinterCampDate:5thJan,设M为直线OB,求证:|a-b|是完全平方数,AC的延长线相切于点K,第二届澳门中学生数学冬令营??第一轮选拔赛比赛日期:2002年1月5日,letObethecentreoftheexcircleofABCwhichtouchessideBC,AB的延长线,PandQrespectivelyLetMbetheintersectionofOBandPQ,而且任何两个互不重迭,使得一块9xn的长方形木板能够用若干以下的图形(见下图)所覆盖,求证:QNAB=MNBC=MPCA,请回答题目1至4,extendedlineABandextendedlineACatpointsK,每题同分,anditcanberotatedifnecessaryGiveaproofofyouranswersGivenatriangleABC,每个图形由三个1x1的磁砖所成,设a,PQ的交点,b为正实数,求证:,2002?Timeallocated:3hoursand30minutesAnswerall4questionsElectroniccalculatorisnotallowedLetaandbbeintegersSupposethatthereexistconsecutiveintegerscanddsuchthata-b=a2c-b2dProvethat|a-b|isaprefectsquare?Findallpossiblevaluesofnsuchthatarectangularboard9xncanbecoveredbyanumberofthefollowingshapes(illustratedbelow)withoutoverlappingEachoftheseshapesisformedby3tilesofdimensions1x1,必要时可旋转,b为整数使得存在连续整数c,设O为三角形ABC的旁切圆的圆心,不能使用任何计算器,答题时间:三小时半,请证明你的答案,andNbetheintersecti,
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