第二列数学词汇手册

GRE主要符号＋plus—minus×multipliedby÷divided＝≈approximay≠notequal＜less>greater≤equaltoorless≥equaltoorgreaterthan roundbrackets square ∈isamemberofthe⊂isasubset~similar≌congruent*denotesan∴∵∶ratiosign,dividedby,is∷equals,squarerootcuberoot∥parallel⊥perpendicularto,atrightangles∠∟rightº′″◉arcethebaseofnaturalfactorialx,x(x-1)(x-2)---logxtothebaseπlogxtothebasee(naturallogxtothebase10(commontheabsolutevalueof数的概念和特性等差数列GREana1n1)d，形式主要为应用题。题目会说三年稳步增长第一年的产量是x,第三年的产量是y,问你的二年的产量。数理统计例：modeof1,1,1,2,3,0,0,0,5is1and0例：rangeof1,1,2,3,5is5-*平均数 *几何平均数(geometricmean）n个数之积的n次。字个数为偶数。例：medianof1,7,4,9,2,5,8is5medianof1,7,4,9,2,5is5+7)/2=6ps:GRE经常众数与数的个数的积和这组数的和的大小。*标准偏差(standard例：standarderrorof0,2,5,7,6is:|0-4|+|2-4|+|5-4|+|7-4|+|6-*standardvariation（方差standardvariationof0,2,5,7,6is:_2222*标准差(standard三个以各顶点为圆心，周长一般为半径的圆的以后的部分的面积。边长*yk1b1yk2b2k1k21)和ABx=(x1+x2)/2,,y=(y1+y2)/2,线段AB两端点间的距离 =x1x2y1y2 立体几何SurfaceRectangularRightCircular2πrh(侧2πr2(底RightCircular概率某一事件在相同的条件下可能发生也可能不发生，这类成为随机(randomoccurrence)。概率就是用来表示随机发生的可能性大小的一个量。很自然的把必然发1，并把不可能发生的的概率定为0，而一般随机的概率是介于0满住下列二条性质的n个随机A1,A2,─An被称为“等概基本组”：⑴A1,A2,─An发生的机会相等；⑵在任一实验中，A1,A2,─An中只有一个发生。等概基本组中的任一随机Ai(i=1,2,─,n)称为“基本”。如果B是由等概念基本组A1,A2,─An的m个基本构成，则B的概率P(B)=m/n,这种讨论概率的模型称为“古典概型”至少有一个抽屉里有两个或的球他就让你比较和1的大小，当然是相等。正态分布 （Gaussian（p(x)

(21e221*型 F(x) 2 2值a的概率是50%。曲线为BAC 百分的：图表(Chart&饼形图(pie线型图(line条带图(bar累积图(cumulative一些很好的

id=jijingzongjie常用数学 *Discount=CostRateof *PythagoreanTheorem(勾股定理):直角三角形(righttriangle)两直角边(legs)的平方和等于斜边(hypotenuse)的平方。数为(n-3)条；式中：n为多边形的边数*A(x1,y1B(x2,y2C(x,y)AB x=(x1+x2)/2,,y=(y1+y2)/2,线段AB两端点间的距离=x1x2y1y2 边长SurfaceRectangularRightCircular2πrh(侧2πr2(底RightCircularA absolute account acute acute add adjacent algebraic algebraic algebraic alternate angle arithmetic(al) arithmetic(al)mean arithmetic(al)progression或series assumethat at atrightangles atthis B bar base beacross becloset becomposed beequal beequivalenttoanther befewer begreater begreaterthanorequal beinscribed beless belessthanorequal beparallel beperpendicular besubstituted blot Ccalculatetothreedecimal *carpoolcatchupwith central circle circular clearanequationof common common common common common complementary complete completequadratic complex composite compound compoundannual concentric consecutive consecutiveeven(odd) consist convert coordinateaxis coordinate coordinate corresponding corresponding *cost cross cubic cubic cubic cubic cumulative curved D decimal decimal decimal (be)direct(inverseproportional discount done(drawn)toscale *dry E equivalent even evenlyeven evenly exterior F *finish from fromthroughGgeometric geometric greatestcommon H高howmuchI improper included pletequadratic independent inexcess infinite infinite inscribed inside integer fractional eginterceptedarc interior interms in inverta irrational J Lleast(lowest)common like(similar) line l Mmathematical mean minorarc 劣弧 mixed Nnatural negative n- notnecessarily numberline numerical Oobtuse obtuse odd ofone onthe 原点,originofcoordinatesoriginal Pparallel percentof rateofpercent percent perfectsquare(cube) ，e.g.25 perpendicular pie pointof prime Q quadratic R real remoteinterior repeating e.g.revolutionspermin S scale shaded simpleannual si