SAT考试数学题的常见符号.

　　对于备考SAT考试的同学来说，在记忆SAT数学词汇的同时，大家也需要关注一下SAT数学题常用的符号，这些符号用英文是如何表示的呢?我们该如何理解呢?下面我们来看看这些SAT数学题常用符号的全部内容吧。

　　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).

　　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.

　　以上就是这些SAT数学题常用符号的全部内容，包括了大家在备考SAT数学考试中经常会用到的一些符号的英文表达的意思，大家可以在备考SAT数学考试的过程中，适当的熟悉记忆一下这些符号和意思。