GRE數(shù)學復習資料：數(shù)學符號

GRE數(shù)學題目中的表示都是用英文所表示的，所以如果弄不懂一些基本的GRE數(shù)學符號的表示方法的話，那一定讀不懂新GRE數(shù)學題目。下面就為大家分享新GRE數(shù)學復習資料新GRE數(shù)學符號的一些情況，幫助大家掌握數(shù)學基礎(chǔ)知識。

+ plus ;positive

- minus ;negative

× multiplied by ;times

÷ divided by

= equals

≈ approximately equals

≠ not equal to

< less than

> greater than

≤ equal to or less than

≥ equal to or greater than o

（ ） round brackets ;parentheses

[ ] square brackets

{ } braces

∈ is a member of the set

? is a subset of

∽ similar to

≌ congruent to

* denotes an operation

∴ therefore

∵ because

∶ ratio sign, divided by, is to

∷ equals, as（proportion）

∥ parallel to

⊥ perpendicular to, at right angles with

∠ angle

∟ right angle

o degree

′ minute

″ second

⊙ circle

A?B arc AB

e the base of natural logarithms,approx.2.71828

x! factorial x, x（x-1）（x-2）---1

lognx log x to the base n

π pi

lnx log x to the base e（natural logarithm）

lgx log x to the base 10（common logarithm）

|x| the absolute value of x