【正文】
和這組數(shù)的和的大小,可以舉幾個(gè)極限情況的例子驗(yàn)證一下。還有一種題型是給你兩組數(shù)的平均值,方差,比較他們的中數(shù)大小。要注意中數(shù)的大小和那兩個(gè)值是沒(méi)有必然聯(lián)系的,無(wú)法比較。 二、新GRE考試數(shù)學(xué)考點(diǎn)簡(jiǎn)析之排列組合 Set A set is a collection of objects or things. Each object in a set a member or element of that of a set is the number of members in the set. Example: The set of even numbers between 2 and 10 is of size 5:{