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SAT数学符号的积累备考

2020-12-09 08:19:51来源:网络

  为了帮助大家高效备考SAT,新东方在线SAT频道为大家带来SAT数学符号的积累备考,希望对大家SAT备考有所帮助。更多精彩尽请关注新东方在线SAT频道!

  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.

  以上就是关于“SAT数学符号的积累备考”的内容,更多精彩内容,请关注SAT频道!


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