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SAT数学考试中的符号

信息来源:网络  发布时间:2015-03-05

  SAT数学中的常用符号是什么意思呢?今天小编就给大家介绍一下SAT数学考试中的符号,希望对大家有所帮助。
 

  Logical Symbols
 

  A ? B means if A is true then B is also true; if A is false then nothing is said about B.
 

  → may mean the same as ? (the symbol may also indicate the domain and codomain of a function; see table of mathematical symbols).
 

  ? may mean the same as ? (the symbol may also mean superset).
 

  A ? B means A is true if B is true and A is false if B is false.
 

  The statement ?A is true if and only if A is false.
 

  The statement A ∧ B is true if A and B are both true; else it is false.
 

  The statement A ∨ B is true if A or B (or both) are true; if both are false, the statement is false.
 

  ? x: P(x) means P(x) is true for all x.
 

  ? x: P(x) means there is at least one x such that P(x) is true.
 

  ?! x: P(x) means there is exactly one x such that P(x) is true.
 

  x ? y means y is derived from x.
 

  以上就是小编整理的SAT数学考试中的符号的大致内容,希望考生们能够把以上内容好好的装进大脑,对于SAT数学成绩的提高一定有很大帮助。
 

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