ACT数学之代数(Algebra)
1 Polynomials 多项式函数
2 基本公式
3 Quadratic Equations 二次方程
4 Functions 函数
A function f from S to T, where S and T are non-empty sets, is a rule that associates with each element of S (the domain 定义域 ) a unique element of T (the codomain, range,值域).
Transformations: 函数变换
5 Matrices 矩阵
A rectangular array of entries displayed in rows and columns and enclosed in brackets.
矩阵的加法：
6 Sequences 序列
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