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河南成考高起专数学复习要点终极总结

  • 2026-09-28 09:52:03
河南成考高起专数学复习要点终极总结

二、数学(文)复习要点

卷面结构:选择题85分 → 填空题16分 → 解答题49分

⚡ 按性价比排序的复习优先级

顺位 板块 预估分值 难度 策略

🥇 集合与逻辑 约10分 ★☆☆☆☆ 零基础也能拿,必须全对

🥈 不等式 约10-15分 ★★☆☆☆ 绝对值不等式年年考

🥉 数列大题 约12分 ★★★☆☆ 默公式就有步骤分

函数性质 约10-15分 ★★★☆☆ 定义域/单调性是核心

导数 约12分 ★★★☆☆ 套路固定,求导即得分

解析几何 约13分 ★★★★☆ 记住标准方程拿一半分

🎯 必背公式清单

知识板块 核心公式

一元二次方程 x = [-b ± √(b²-4ac)] / 2a;Δ = b²-4ac

等差数列 an = a₁ + (n-1)d;Sn = (a₁+an)×n÷2

等比数列 an = a₁·qⁿ⁻¹;Sn = a₁(1-qⁿ)/(1-q)

指数运算 aᵐ×aⁿ=aᵐ⁺ⁿ;aᵐ÷aⁿ=aᵐ⁻ⁿ;(aᵐ)ⁿ=aᵐⁿ;a⁰=1

对数运算 logₐ1=0;logₐa=1

两点距离 √[(x₁-x₂)² + (y₁-y₂)²]

椭圆 x²/a² + y²/b² = 1,c² = a² - b²

🎯 解答题拿分策略

即使不会做,也绝不空着!

大题类型 保底动作 可拿分数

数列题 写出等差/等比通项公式 + 求和公式 4-6分

导数题 对函数求导,令f'(x)=0 4-6分

解析几何 写出标准方程 3-4分

🎯 易错点警示

易错点 正确做法

绝对值不等式 大于取两边,小于取中间

分母不能为零 求定义域先写 x ≠ 某值

对数真数>0 看到log立刻标注真数范围

.1 必背公式卡片

📌 集合与逻辑

A∩B = {x|x∈A 且 x∈B}     ← 交集:取公共部分

A∪B = {x|x∈A 或 x∈B}     ← 并集:取全部元素

A→B(A成立则B必成立)       ← 充分条件

B→A(A成立必须B先成立)     ← 必要条件

📌 绝对值不等式(每年必考5分!)

|x| < a  →  -a < x < a      (小于取中间)

|x| > a  →  x < -a 或 x > a (大于取两边)

示例:

|x-2| < 3  →  -3 < x-2 < 3  →  -1 < x < 5

|x+1| > 2  →  x+1 < -2 或 x+1 > 2  →  x < -3 或 x > 1

📌 一元二次方程

求根公式:x = ————————————

a

判别式:Δ = b² - 4ac

  Δ > 0  →  两个不等实根

  Δ = 0  →  两个相等实根

  Δ < 0  →  无实根

根与系数关系:x₁+x₂ = -b/a,x₁·x₂ = c/a

📌 指数运算

a⁰ = 1 (a≠0)

aᵐ × aⁿ = aᵐ⁺ⁿ

aᵐ ÷ aⁿ = aᵐ⁻ⁿ

(aᵐ)ⁿ = aᵐⁿ

(ab)ⁿ = aⁿbⁿ

a⁻ⁿ = 1/aⁿ

📌 对数运算

logₐ1 = 0

logₐa = 1

logₐ(MN) = logₐM + logₐN

logₐ(M/N) = logₐM - logₐN

logₐMⁿ = n·logₐM

📌 数列公式

等差数列 等比数列

通项 an = a₁ + (n-1)d an = a₁·qⁿ⁻¹

前n项和 Sn = (a₁+an)·n ÷ 2 Sn = a₁(1-qⁿ)/(1-q) (q≠1)

中项 2b = a + c b² = a·c

📌 三角函数值

角度 0° 30° 45° 60° 90°

sin 0 1/2 √2/2 √3/2 1

cos 1 √3/2 √2/2 1/2 0

tan 0 √3/3 1 √3 —

📌 几何公式

两点距离:d = √[(x₁-x₂)² + (y₁-y₂)²]

中点坐标:( (x₁+x₂)/2 , (y₁+y₂)/2 )

点到直线距离:d = |Ax₀+By₀+C| / √(A²+B²)

椭圆:x²/a² + y²/b² = 1(a>b>0),c² = a² - b²

双曲线:x²/a² - y²/b² = 1,c² = a² + b²

抛物线:y² = 2px,焦点(p/2,0)

📌 导数公式

(C)' = 0

(xⁿ)' = nxⁿ⁻¹

(eˣ)' = eˣ

(lnx)' = 1/x

(sinx)' = cosx

(cosx)' = -sinx

导数应用:

  单调递增区间:解 f'(x) > 0

  单调递减区间:解 f'(x) < 0

  极值点:令 f'(x) = 0,解出x

  切线斜率:k = f'(x₀)

.2 选择题速判技巧

技巧 操作

代入法 选项代入题干验证,符合即为答案

特殊值法 取 x=0, x=1, x=-1 代入快速判断

排除法 先排除明显错误选项,提高猜对概率

图形法 画图辅助判断,尤其是函数和不等式

📚 河南成考高起专文科类:三科复习要点总结


📋 考试总览

科目满分时间选择题非选择题目标分数
语文150120分钟≈40分≈110分65-80分
数学(文)150120分钟85分65分35-50分
英语150120分钟125分25分50-65分
总分450———≥150分过线

💡 成考是过关性考试,三科平均每科40-50分即可,不需要全会!

必背公式

【绝对值不等式】每年必考!!!

  |x| < a  →  -a < x < a        (小于取中间)

  |x| > a  →  x < -a 或 x > a   (大于取两边)

【一元二次方程】

  x = [-b ± √(b²-4ac)] / 2a

  Δ = b² - 4ac

【等差数列】

  an = a₁ + (n-1)d

  Sn = (a₁ + an) × n ÷ 2

【等比数列】

  an = a₁ · qⁿ⁻¹

  Sn = a₁(1-qⁿ) / (1-q)

【指数运算】

  aᵐ × aⁿ = aᵐ⁺ⁿ

  aᵐ ÷ aⁿ = aᵐ⁻ⁿ

  a⁰ = 1

【两点距离】

  d = √[(x₁-x₂)² + (y₁-y₂)²]

【椭圆】

  x²/a² + y²/b² = 1,c² = a² - b²

【导数】

  (xⁿ)' = nxⁿ⁻¹

  单调增:f'(x) > 0

  极值点:f'(x) = 0

💡 解答题不空策略

大题类型 保底动作 可拿分

数列题 写出通项公式 + 求和公式 4-6分

导数题 求导 + 令f'(x)=0 4-6分

解析几何 写出标准方程 3-4分

📌 写步骤就有分,空着一定零分!

💡 选择题技巧

技巧 用法

代入法 选项代入题干验证

特殊值 取x=0,1,-1快速判断

排除法 先排除明显错误项

基本 文件 流程 错误 SQL 调试
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  1. CONNECT:[ UseTime:0.000496s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000756s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000383s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000345s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000544s ]
  6. SELECT * FROM `set` [ RunTime:0.000287s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000626s ]
  8. SELECT * FROM `article` WHERE `id` = 517178 LIMIT 1 [ RunTime:0.000412s ]
  9. UPDATE `article` SET `lasttime` = 1790649916 WHERE `id` = 517178 [ RunTime:0.001276s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000315s ]
  11. SELECT * FROM `article` WHERE `id` < 517178 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000498s ]
  12. SELECT * FROM `article` WHERE `id` > 517178 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000379s ]
  13. SELECT * FROM `article` WHERE `id` < 517178 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000621s ]
  14. SELECT * FROM `article` WHERE `id` < 517178 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000720s ]
  15. SELECT * FROM `article` WHERE `id` < 517178 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000837s ]
0.091365s