UKiset考试培训越来越火热，UKiset教材受关注，中小学留学成为家长之间的心仪之选。在UKiset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?那跟着英国私立学校入学考试资源网来看看这些逻辑符号到底是什么意思吧~
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.
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