2017年GRE数学备考代数词汇复习笔记

1、代数词汇1 .有关数学运算add,plus力口subtract减difference差multiply,times乘product积divide除divisible可被整除的dividedevenly被整除dividend被除数，红禾divisor因子，除数quotient商remainder余数factorial阶乘power乘方radicalsign,rootsign根号roundto四舍五入tothenearest四舍五入2 .有关集合union并集propersubset真子集3 .有关代数式、方程和不等式algebraicterm代数项同类项liketerms,similarterm

2、sinequality不等式numerical coefficient数字系数literal coefficient字母系数triangleinequality三角不等式range值域originalequation原方程equivalentequation同解方程，等价方程linearequation线性方程(e.g.5x+6=22)4 .有关分数和小数properfraction真分数improperfraction假分数mixednumber带分数vulgarfraction,commonfraction普通分数simplefraction简分数complexfraction繁分数num

3、erator分子denominator分母(least)commondenominator(最小)公分母quarter四分之一decimal fraction 纯小数infinitedecimal无穷小数recurringdecimal循环小数tenthsunit十分位5 .基本数学概念arithmeticmean算术平均值weightedaverage力口权平均值geometricmean几何平均数exponent指数,幕base乘幕的底数，底边cube立方数，立方体squareroot平方根cuberoot立方根commonlogarithm常用对数digit数字constant常数var

4、iable变量inversefunction反函数complementaryfunction余函数linear一次的，线性的factorization因式分解absolutevalue绝对值，e.g.|-32|=32roundoff四舍五入6 .有关数论naturalnumber自然数positivenumber正数negativenumber负数oddinteger,oddnumber奇数eveninteger,evennumber偶数integer,wholenumber整数positivewholenumber正整数negativewholenumber负整数consecutivenum

5、ber连续整数realnumber,rationalnumber实数,有理数irrational(number)无理数inverse倒数compositenumber合数e.g.4,6,8,9,10,12,14,15primenumber质数e.g.2,3,5,7,11,13,15注意：所有的质数(2除外)都是奇数，但奇数不一定是质数reciprocal倒数commondivisor公约数multiple倍数(least)commonmultiple(最小)公倍数(prime)factor(质)因子commonfactor公因子ordinaryscale,decimalscale十进制nonnegative非负的tens十位units个位mod吩数median中数commonratio公比7.数列arithmeticprogression(sequence)等差数列geometricprogression(sequence)等比数歹U8.其它approximate近似(anti)clockwise(逆)顺时针方向cardinal基数ordinal序数directproportion正比distinct不同的estimation估计，近似par