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SAT数学运算常用符号

信息来源:网络  发布时间:2015-01-06

  下面是为考生收集整理的一些SAT数学运算常用符号,希望考生在备考的时候能认真了解,以便在考试中更好的发挥。
 

  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.
 

  以上内容给考生详细介绍了SAT数学运算常用符号,希望考生在备考的时候能认真了解,另外,SAT数学考试虽然难度不大,但是考生要想取得一个不错的SAT考试成绩,也需要多做真题练习。
 

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