托福

长按二维码,轻松关注托福免费模考微信公众号

轻轻一按,托福水平早知道

轻轻一问,名师助你来备考

托福理科生必备:数学公式读法

信息来源:网络  发布时间:2015-07-04

  今天前程百利小编为大家分享的是托福理科生必备:数学公式读法。大家可以参考一下这些备考经验,看看自己应该如何攻克托福

  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

  A\B 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

  x¯ x bar

  x˜ x tilde

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

  ∑(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

  OA¯ 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

  好了,以上就是前程百利小编为大家整理的托福理科生必备:数学公式读法。相信大家一定有所收获,希望能在备考的路上助大家一臂之力。最后,小编预祝大家在托福考试中取得好成绩。

您还可能关注:

前程百利托福小班辅导

前程百利外教小班

前程百利一对一辅导课程

分享到:

相关推荐

托福听力中的隐性技巧

SSS为什么是备考托福听力背景知识的首选?

托福听力考试中对语法的考察点(一)

托福考试