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试卷分析 | 遵义市2027届高三联考数学

  • 2026-10-28 15:34:48
试卷分析 | 遵义市2027届高三联考数学

职务

教研组长、资深高中数学讲师

教龄

12年

关键履历

曾任金东方:高中数学讲师、高中数学学科组长、高中数学教研室主任、教学主管、学科主管等

教学成果

所带学员多人高考成绩140+,最高149分。

教学特色/方法

引导式教学,启发式提问,探索式学习,分层式教学。

誉奖项

集团年度优秀讲师、集团十大杰出青年教师

代表课程/教材

《高考数学最后一讲》、《高考数学最后一卷》、高中数学学案及讲义必修4册、选修3册

整卷结构分析

很多同学认为正态分布只考选择题及填空题,这次考到解答题了,部分同学反而不会书写正态分布问题的解题过程了,导致知道答案但不会写过程而拿不到满分

部分试题赏析

函数综合问题,由分段函数的对称点个数求参,利用方程将对称点个数转化为对应方程解的个数问题,再利用导数研究函数的单调性从而得到参数的取值范围;分段函数是高考常考题型,本题涉及知识点较多,对于未完成一轮复习的同学来说难度较大。

点评:很多压轴题都有两种解法,第一种不需多思考但计算量巨大(可以暴力运算),第二种思维量大但计算量小;高考现在更倾向于多想少算。

解析几何综合,本卷最精彩的试题之一,在使用判别式法判断直线与双曲线交点个数时,需优先考虑直曲联立后的所得方程的二次项系数是否为零,若二次项系数为零,也就是直线与双曲线平行的时候,方程转化为一元一次方程有唯一解,但这时直线与双曲线相交不符合题意需要排除;若联立得到的方程二次项系数不为零,才能使用判别式进行位置关系的判定(直线与椭圆及抛物线联立时不会出现这种情况的);D选项为隐圆的一部分,一个残缺的圆与直线交点个数需先计算出直线与完整圆交点的坐标,再判断该坐标是否在残缺的圆上即可。

点评:压轴题里题目越简短试题的难度越大,这个原则一直没被打破,高手的知识都是体系化的,这使其在遇到不曾见过的偏难怪题时也能顺利攻克。

填空压轴题,先由等差数列出求通项公式,再利用裂项相消简化求和表达式,最后由均值不等式得到具体的最值。

点评:本题表面看是考数列,实际是数列与不等式的综合题目;思维跨度大;注意到这点本题也就平平常常了;考试的时候不是想不到,是遇见得太少了。

第二问考察正态分布问题,利用正态分布做估值;正态分布是三大分布中考察最少最简单的。

点评:很多同学认为正态分布只考选择题及填空题,这次考到解答题了,部分同学反而不会书写正态分布问题的解题过程了,导致知道答案但不会写过程而拿不到满分。

部分试题详解

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