AIME相关论文
今年3月18日,上海赛区有154名中学生,参加了第四届美国数学邀请赛.竞赛试题共有15个,答对一题得1分,满分为15分.并规定在3小时内完......
1、一个非负整数的有序对(m,n)称为“简单的”,如果在做m+n的加法时用不着进位。m+n称为有序对(m,n)的和,求和为1942的“简单的”......
1.已知:xy+x+y=71,x~2y+xy~2=880,x,y为正整数,求x~2十y~2. 2.矩形ABCD,AB=4,CB=3,点A=p_O,P_1,…,P_(168)=B把AB边分为168个相等......
1.一种能大批供应的锁,每个锁上有10个按钮,为了打开这锁必须按下5个正确的按钮,按的次序无关。如图所示的样品.{1,2,3,6,9}是正......
1988年3月22日(星期二)上午9.00～12.00 1.一种能大批供应的锁,每个锁上有10个按钮,为了打开这锁必须按下5个正确的按钮,按的次序无......
1.计算((31)(30)(29)(28)+1)~(1/2) 解:利用x(x+1)(x+2)(x+3)+1 =(x~2+3x+1)~2。令x=28,得((31)(30)(29)(28)+1)~(1/2)=869 2.10......
The taper-shaped superconducting quarter wave resonators with frequency of 80.5 MHz,β of 0.041and 0.085 have been pre-r......
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为了扩大与数学爱好者进行交流的视野,锻炼自己的英语阅读能力,感受不同文化背景下的中学数学活动,我们对2009年4月1日举
In orde......
Overseas Merger and Acquisition(M&A)is not only the major means for the enterprises to expand rapidly and operate global......
Determining the relatively similar hydrological properties of the watersheds is very crucial in order to readily classif......
Objective Chromium has many important functions in the human body. For the osseous tissue, its role has not been clearly......
Effects of minocycline on the expression of NGF and HSP70 and its neuroprotection role following int
The present study was aimed to investigate the effects of minocycline (MC) on the expression of nerve growth factor (NGF......
NON-PENETRATING DEEP SCLERECTOMY AND CATARACT EXTRACTION IN TERMS OF MOBILE CLINIC ON RIVER SHIPBORD
The quantity of patients with terminal glaucoma, overripe cataracts and other neglected eye pathology increases that in......
In order to explore the cutting rules,optimize the cutting parameters and improve cutting efficiency of titanium alloy,m......
[Objective]This study aimed to provide a scientific basis for breeding new sugarcane varieties with hybrid progenies of ......
卫星导航系统存在许多类型的故障模型，其中最难检测的是慢变斜坡故障（SGE）。针对卫星导彬捷联惯导（GNSS／SINS）组合导航系统中存在的慢变......
美国数学邀请赛(AIME)始于1983年,在此之前,美国中学生数学竞赛(AHSME)是作为美国数学奥林匹克(USAMO)的资格赛。由于AHSME采用的......
1.在4000至7000之间有多少个四个数字均不相同的偶数? 2.在一次竞选中,一个候选人到国家各处去游说,我们假设整个国家在一个平面上......
1、求所有小于10且写成既约分数时,分母为30的正有理数之和。 2、一个正整数称为“上升的”,如果在其十进位制表示中至少有两个数......
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1.已知 xy+x+y=71,x<sup>2</sup>y+xy<sup>2</sup>=880.x,y 为正整数,求 x<sup>2</sup>+y<sup>2</sup>.2.矩形 ABCD 中,（?）=4,（?）=3,点......
1.既约分数的分母为30,求小于10的所有这样的正有理数的和. 2.一个最少为两位数的十进制正整数,它的每一位数总比其右边位置上的数......
