在SAT数学考试中经常会用到的SAT数学公式，也许同学们对这些公式很熟悉，但你不一定知道它的读法。下面就来教以教大家这些数学达人必须要掌握的读法吧。

　　1.Logic

　　?there exist

　　?for all

　　p?q p implies q / if p, then q

　　p?q p if and only if q /p is equivalent to q / p and q are equivalent

　　2.Sets

　　x∈A x belongs to A / x is an element (or a member) of A

　　x?A x does not belong to A / x is not an element (or a member) of A

　　A?B A is contained in B / A is a subset of B

　　A?B A contains B / B is a subset of A

　　A∩B A cap B / A meet B / A intersection B

　　A∪B A cup B / A join B / A union B

　　AB A minus B / the diference between A and B

　　A×B A cross B / the cartesian product of A and B

　　3. Real numbers

　　x+1 x plus one

　　x-1 x minus one

　　x±1 x plus or minus one

　　xy xy / x multiplied by y

　　(x-y)(x+y) x minus y, x plus y

　　= the equals sign

　　x=5 x equals 5 / x is equal to 5

　　x≠5 x (is) not equal to 5

　　x≡y x is equivalent to (or identical with) y

　　x>y x is greater than y

　　x≥y x is greater than or equal to y

　　x≤y x is less than or equal to y

　　0≤x≤1 zero is less than or equal to x is less than or equal to 1

　　|x| mod x / modulus x

　　x2 x squared / x (raised) to the power 2

　　x3 x cubed

　　x4 x to the fourth / x to the power 4

　　xn x to the nth / x to the power n

　　x (?n) x to the (power) minus n

　　x的平方根(square) root x / the square root of x

　　x的三次根cube root (of) x

　　x的四次根fourth root (of) x

　　x的n次根nth root (of) x

　　(x+y)2 x plus y all squared

　　n! n factorial

　　x^x hat

　　xˉ x bar

　　x? x tilde

　　xi xi / x subscript i / x suffix i / x sub i

　　Σ(i=1~n) ai the sum from i equals one to n ai / the sum as i runs from 1 to n of the ai

　　4. Linear algebra

　　‖x‖the norm (or modulus) of x

　　OA→OA / vector OA

　　OAˉ OA / the length of the segment OA

　　AT A transpose / the transpose of A

　　A?1 A inverse / the inverse of A

　　5. Functions

　　f(x) fx / f of x / the function f of x

　　f:S→T a function f from S to T

　　x→y x maps to y / x is sent (or mapped) to y

　　f’(x) f prime x / f dash x / the (first) derivative of f with respect to x

　　f”(x) f double-prime x / f double-dash x / the second derivative of f with respect to x

　　f”’(x) triple-prime x / f triple-dash x / the third derivative of f with respect to x

　　f (4) (x) f four x / the fourth derivative of f with respect to x

　　?f/?x1 the partial (derivative) of f with respect to x1

　　?2f/?x12 the second partial (derivative) of f with respect to x1

　　∫0∞ the integral from zero to infinity

　　limx→0the limit as x approaches zero

　　limx→0+the limit as x approaches zero from above

　　limx→0?the limit as x approaches zero from below

　　logey log y to the base e / log to the base e of y / natural log (of) y

　　lny log y to the base e / log to the base e of y / natural log (of) y

　　以上就是关于SAT数学公式的英语读法的介绍。知道了这些SAT数学考试中公式的读法后，以后不仅是SAT数学考试，哪怕给老外作报告的时候，也不用再用”The equation is like this…”, “The value is like this…”这样尴尬的语言啦，是不是很有用呢。

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