一、数一考研简介
数一考研，全称为数学一研究生入学考试，是我国研究生入学考试中数学学科的一种。数一考试主要面向理工科专业的研究生入学考试，考察考生对高等数学、线性代数、概率论与数理统计等数学基础知识的掌握程度。
二、2015年数一真题回顾
以下为2015年数一考研的部分真题，供参考：
选择题：
- 设函数\(f(x) = x^3 - 3x^2 + 4x\)，则\(f(x)\)的极值点为（ ）
- A. \(x = 1\)
- B. \(x = 2\)
- C. \(x = 3\)
- D. \(x = -1\)
- 设函数\(f(x) = x^3 - 3x^2 + 4x\)，则\(f(x)\)的极值点为（ ）
填空题：
- 设\(a > 0\)，则$\lim_{x \to 0} \frac{\sin ax}{x} = ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________