在SAT数学考试中，或多或少的都会经常出现一些常用逻辑符号，感觉有点眼生，怎么办？编一起来看看这些逻辑符号到底是什么意思？
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.

　　以上就是小编为大家整理的SAT备考资料，希望能够帮助到大家。