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6月ACT考前江湖救急:数学英语重难常考知识点梳理

2016-06-06来源: 互联网浏览量:
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   以下知识是数学的重难知识点,考前有必要多关注:

  1.行列式与矩阵

  2.复数

  3.高次方程求根

  4.线性规划与应用

  5.极限与渐近线求法

  6.计数原理和排列组合

  7.统计概率相关

  8.三角函数相关知识

  同时,有些题目涉及费用计算、工程作业、空间几何等问题,也常常可能成为失分的题目。

  一些容易忽略的知识点:

  多边形内角和、外角和公式;

  The sum of the interior angles of a polygon with n sides is (n – 2)180º.

  The sum of the exterior angles of any polygon is 360º.

  圆弧长和弧度计算;

  The arclength formula is:

6月ACT考前江湖救急:数学英语重难常考知识点梳理.jpg

  where nis the measure of the degree of the arc and r is the radius.

  椭圆和双取钱的方程和图像;

 

  Ellipses椭圆

6月ACT考前江湖救急:数学英语重难常考知识点梳理2.jpg

  Thestandard form of the equation of an ellipse is:

6月ACT考前江湖救急:数学英语重难常考知识点梳理3.jpg

  Thecenter of the ellipse is (h, k).

  Hyperbolas双曲线

6月ACT考前江湖救急:数学英语重难常考知识点梳理4.jpg

 

  Thestandard form of the equation of a hyperbola that opens to the sides is:

6月ACT考前江湖救急:数学英语重难常考知识点梳理5.jpg

  where a,b, h, and k are constants. The standard form of theequation of a hyperbola that opens upward and downward is the same as the sideform except that the (x – h) and (y – k) terms areinterchanged:

6月ACT考前江湖救急:数学英语重难常考知识点梳理6.jpg

 

  Thecenter of a hyperbola is (h, k), and the axis of symmetry is theline x = h for vertical hyperbolas or y = k forhorizontal hyperbolas.

  排列组合与概率:

6月ACT考前江湖救急:数学英语重难常考知识点梳理7.jpg

  A permutation is an ordering of elements. A combination is anunordered grouping of a set. An example of a scenario in which order doesn’tmatter is a hand of cards: a king, ace, and five is the same as an ace, five,and king.

 

  等差数列前n项和的公式:

6月ACT考前江湖救急:数学英语重难常考知识点梳理8.jpg

  复数(ComplexNumbers)的计算;

  A complex number is the sum of a real number and an imaginarynumber. A complex number is written in the form of a + bi, where aand b are real numbers, and i =数学英语重难常考知识点梳理.jpg

 

  矩阵的乘法(Matrixmultiplication);

6月ACT考前江湖救急:数学英语重难常考知识点梳理10.jpg

  函数的渐近线(asymptote)

  Asymptote

 

  A line thata curve approaches, as it heads towards infinity

6月ACT考前江湖救急:数学英语重难常考知识点梳理10.jpg



本文关键字:ACT数学英语,重难知识点梳理
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