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SAT数学考试中常见运算符号汇总

小站整理2015-03-11 15:58:36

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摘要：SAT数学题是中国考生的强项，但是切忌因为轻视SAT数学而造成不必要的失分，特别是由于看不懂题意或因为表达不当而导致拿不到数学高分就太可惜了。因此，小站君在这里为大家整理了SAT数学考试中常见的运算符号帮助大家学习。

本文为大家整理了SAT数学考试中常见的运算符号帮助大家学习。

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.

希望以上内容对广大SAT考生有所帮助，避免因为看不懂题目而错失了考出SAT数学高分的机会。

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