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新高一数学开学首月预习30天 学生训练·答案解析·二刷闭环原创模拟训练·PAGESTARTHERE/使用导览先确认对象、目标与最短使用路径,再开始做题。资料的价值不在“题目很多”,而在每天知道做什么、做到什么程度、错了怎样回来。适用对象即将开学或开学首月需要同步预习、巩固与周测闭环的新高一学生本资料解决什么把集合、逻辑、不等式与函数性质按学习依赖顺序编排,避免提前学成碎片。3步启动01定位先完成开篇诊断或第1天训练;正确率低于70%时,从基础步骤开始,不跳题。02执行普通练限时20分钟;周测或检测按文中时间完成。答案必须在全部作答后再打开。03闭环订正时写“错因标签”;48小时后只看题号完成同类二刷,二刷仍错再回到解析。交付清单模块你将获得训练主体124题|4次周测|逐题解析|48小时错题二刷答案支持每题答案+关键步骤/检查点;答案区与学生区分离复盘支持进度表、错因标签、48小时二刷记录与能力雷达使用边界原创模拟训练,非官方真题,不代表任何学校或地区命题打印建议双面打印时,训练区与答案区可分册装订;教师或家长保留答案分册。黑白打印仍可区分层级,彩色打印能强化首屏与模块识别。
使用标准与评分规则完成标准题目不留空;不会时写到卡点,而不是直接抄答案。步骤标准定义域、分母限制、根式条件、不等号变向与单位必须显式写出。订正标准用另一种颜色完成;在错因栏只选一个“第一原因”。二刷标准间隔48小时、遮住原答案、重新完整作答;只看懂不算会。错因标签A概念不清B条件遗漏C符号/计算D方法选择E图像/区间语言F步骤表达G审题/单位完成前自检□我能在限时内独立完成,不边做边看答案。□我会在定义域、分母、根式和不等号处主动写条件。□我能把零点、截距、单调区间和顶点写成规范数学语言。□我愿意在48小时后重新做错题,而不是只看订正。
第一部分学生训练区请先独立完成全部训练,再进入答案解析区。普通练按20分钟执行,周测/检测按页面标注执行。第1天集合的含义与表示每日练|建议20分钟|16分目标:建立高中数学的第一套符号语言1.设A={x∈Z|0≤x≤7},用列举法写出集合A,并求元素个数。答:________________________________________________________________________________________________________________________________________________________________2.判断下列说法并说明理由:①2∈{2,3};②{2}∈{2,{2},3};③∅⊆{2,3}。答:________________________________________________________________________________________________________________________________________________________________3.若集合{1,a+2}={1,4},求实数a。答:________________________________________________________________________________________________________________________________________________________________4.设A={x∈Z|-5≤x<2},用列举法写出集合A,并求元素个数。答:________________________________________________________________________________________________________________________________________________________________易错提醒先分清元素、集合与子集;区间端点先判断能否取到。———————————————第2天集合之间的关系每日练|建议20分钟|16分目标:区分属于、包含与相等1.判断下列说法并说明理由:①{5}⊆{5,6};②{5}∈{5,6};③∅∈{5,6}。答:________________________________________________________________________________________________________________________________________________________________2.已知A={-1,2,6,8,9},B={-2,1,2,4,8},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________3.判断下列说法并说明理由:①8∈{8,9};②{8}∈{8,{8},9};③∅⊆{8,9}。答:________________________________________________________________________________________________________________________________________________________________4.已知A={-1,0,1,2,9},B={1,3,7,8,9},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________易错提醒先分清元素、集合与子集;区间端点先判断能否取到。
第3天集合基本运算每日练|建议20分钟|16分目标:熟练交集、并集与差集1.已知A={-2,1,4,5,7},B={-1,2,3,5,9},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________2.已知A={2,3,5,7,8},B={-2,2,3,5,9},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________3.已知A={0,3,5,7,9},B={-1,2,3,6,8},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________4.已知A={-2,0,1,3,4},B={-2,0,5,7,9},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________易错提醒先分清元素、集合与子集;区间端点先判断能否取到。———————————————第4天区间表示每日练|建议20分钟|16分目标:用开闭端点表达数集1.已知A=(-4,2),B=[0,7],求A∩B与A∪B。答:________________________________________________________________________________________________________________________________________________________________2.解不等式-4x+4>12,并用区间表示解集。答:________________________________________________________________________________________________________________________________________________________________3.已知A=[-6,1],B=(0,6],求A∩B与A∪B。答:________________________________________________________________________________________________________________________________________________________________4.解不等式-3x-5≥-20,并用区间表示解集。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。
第5天补集与全集每日练|建议20分钟|16分目标:运算前先确认全集范围1.全集U={1,2,3,4,5,6,7,8,9},A={3,4,5,9},求∁ᵤA。答:________________________________________________________________________________________________________________________________________________________________2.已知A={-2,-1,1,2,5},B={-2,1,6,8,9},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________3.全集U={1,2,3,4,5,6,7,8,9},A={2,3,8,9},求∁ᵤA。答:________________________________________________________________________________________________________________________________________________________________4.已知A={1,4,5,7,9},B={-1,0,2,7,9},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。———————————————第6天集合综合应用每日练|建议20分钟|16分目标:连接参数、不等式与区间1.若集合{1,a-2}={1,4},求实数a。答:________________________________________________________________________________________________________________________________________________________________2.解复合不等式-5<2x-3≤9。答:________________________________________________________________________________________________________________________________________________________________3.已知A=[-5,2),B=(-1,3),求A∩B与A∪B。答:________________________________________________________________________________________________________________________________________________________________4.若集合{1,a+2}={1,5},求实数a。答:________________________________________________________________________________________________________________________________________________________________易错提醒先分清元素、集合与子集;区间端点先判断能否取到。
第7天周测一:集合周测|建议30分钟|20分目标:完成集合单元第一次闭环1.已知A={1,2,3,5},B={1,3,5,7},则A∩B=()。A.{1,3,5}B.{2}C.{7}D.{1,2,3,5,7}2.设A={x∈Z|-1≤x≤6},用列举法写出集合A,并求元素个数。答:________________________________________________________________________________________________________________________________________________________________3.已知A={-1,2,3,4,6},B={-2,1,4,5,6},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________4.已知A=[-4,3),B=(2,8],求A∩B与A∪B。答:________________________________________________________________________________________________________________________________________________________________5.全集U={1,2,3,4,5,6,7,8,9},A={1,3,4,7},求∁ᵤA。答:________________________________________________________________________________________________________________________________________________________________易错提醒先分清元素、集合与子集;区间端点先判断能否取到。
第8天命题与量词每日练|建议20分钟|16分目标:识别全称命题并写出否定1.写出命题“∀x∈R,x²+3>0”的否定。答:________________________________________________________________________________________________________________________________________________________________2.判断下列对应是否能构成函数:每个圆对应它的面积。说明理由。答:________________________________________________________________________________________________________________________________________________________________3.判断下列对应是否能构成函数:每名学生对应自己的学号。说明理由。答:________________________________________________________________________________________________________________________________________________________________4.写出命题“∀x∈R,x²+2>0”的否定。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。———————————————第9天充分条件与必要条件每日练|建议20分钟|16分目标:分别检查正向与反向1.判断“x>4”是“x>0”的充分条件、必要条件还是充要条件。答:________________________________________________________________________________________________________________________________________________________________2.“x>5”是“x>0”的()。A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要3.判断“x>2”是“x>0”的充分条件、必要条件还是充要条件。答:________________________________________________________________________________________________________________________________________________________________4.“x>9”是“x>0”的()。A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要易错提醒先标注题型与限制条件,再选择最短解法。
第10天逻辑语言综合每日练|建议20分钟|16分目标:用反例检验不成立的方向1.判断“x>6”是“x>0”的充分条件、必要条件还是充要条件。答:________________________________________________________________________________________________________________________________________________________________2.写出命题“∀x∈R,x²+10>0”的否定。答:________________________________________________________________________________________________________________________________________________________________3.判断“x>9”是“x>0”的充分条件、必要条件还是充要条件。答:________________________________________________________________________________________________________________________________________________________________4.判断“x>5”是“x>0”的充分条件、必要条件还是充要条件。答:________________________________________________________________________________________________________________________________________________________________易错提醒判断充分必要条件时,正向与反向必须分别验证。———————————————第11天一元二次方程回顾每日练|建议20分钟|16分目标:为二次不等式准备零点1.解方程x²+7x+12=0。答:________________________________________________________________________________________________________________________________________________________________2.因式分解:x²-8x+15。答:________________________________________________________________________________________________________________________________________________________________3.解方程x²-x-30=0。答:________________________________________________________________________________________________________________________________________________________________4.因式分解:x²-10x+24。答:________________________________________________________________________________________________________________________________________________________________易错提醒先写等价变形,再检查分母、根式或参数限制。
第12天二次式符号每日练|建议20分钟|16分目标:利用零点分区间1.解不等式(x+4)(x-1)≥0。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)=x²+2x,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________3.解不等式(x+4)(x-6)≤0。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=x²-x-2,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。———————————————第13天一元二次不等式每日练|建议20分钟|16分目标:把图像位置转成解集1.解不等式(x+4)(x-6)<0。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)=x²-4x-12,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________3.解不等式(x+3)(x-4)≤0。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=x²-10x+24,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________易错提醒乘除负数必须改变不等号方向,最后用区间复核端点。
第14天周测二:逻辑与二次不等式周测|建议30分钟|20分目标:检验命题、条件、零点与符号1.“x>8”是“x>0”的()。A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要2.方程x²-8x+15=0的两根是()。A.3和5B.4和6C.2和4D.-3和-53.判断“x>8”是“x>0”的充分条件、必要条件还是充要条件。答:________________________________________________________________________________________________________________________________________________________________4.解不等式(x+1)(x-5)<0。答:________________________________________________________________________________________________________________________________________________________________5.已知f(x)=x²-25,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________易错提醒乘除负数必须改变不等号方向,最后用区间复核端点。
第15天函数概念每日练|建议20分钟|16分目标:理解自变量与唯一函数值1.判断下列对应是否能构成函数:每个班级对应班内最高学生的身高。说明理由。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)=2x+4,求f(0)、函数零点,并说明单调性。答:________________________________________________________________________________________________________________________________________________________________3.已知f(x)=2x²+2x-4,计算f(-1)、f(2)、f(-2)。答:________________________________________________________________________________________________________________________________________________________________4.函数f(x)=3x³+2x是()。A.奇函数B.偶函数C.非奇非偶函数D.既是奇函数又是偶函数易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。———————————————第16天函数求值每日练|建议20分钟|16分目标:规范代入和括号1.已知f(x)=x²,计算f(-3)、f(-2)、f(0)。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)=2x²+3x+4,计算f(-3)、f(-1)、f(2)。答:________________________________________________________________________________________________________________________________________________________________3.已知f(x)=x²-2x+2,计算f(-2)、f(2)、f(-1)。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=x²-2x-3,计算f(1)、f(0)、f(2)。答:________________________________________________________________________________________________________________________________________________________________易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。
第17天函数定义域每日练|建议20分钟|16分目标:综合分母和根式限制1.求函数y=(x-4)/(x-1)的定义域。答:________________________________________________________________________________________________________________________________________________________________2.求函数y=√(-2-x)的定义域。答:________________________________________________________________________________________________________________________________________________________________3.求函数y=√(x-2)/(x-5)的定义域。答:________________________________________________________________________________________________________________________________________________________________4.求函数y=(x-3)/(x-6)的定义域。答:________________________________________________________________________________________________________________________________________________________________易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。———————————————第18天一次函数复习每日练|建议20分钟|16分目标:从初中图像语言过渡到高中函数语言1.已知f(x)=4x-4,求f(-2)、函数零点,并说明单调性。答:________________________________________________________________________________________________________________________________________________________________2.一次函数图像经过点(0,-5)与(2,-1),求解析式、零点和单调性。答:________________________________________________________________________________________________________________________________________________________________3.用“截距、零点、增减”三种语言描述直线y=-4x-5。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=-4x+4,求f(-1)、函数零点,并说明单调性。答:________________________________________________________________________________________________________________________________________________________________易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。
第19天分段函数每日练|建议20分钟|16分目标:按自变量范围选择表达式1.已知f(x)={2x-1(x<-2),2x(x≥-2)},求f(-3)与f(-2)。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)={x+1(x<0),-2x-1(x≥0)},求f(-1)与f(3)。答:________________________________________________________________________________________________________________________________________________________________3.已知f(x)={2x(x<2),3x+2(x≥2)},求f(-1)与f(3)。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)={x-3(x<-1),2x-2(x≥-1)},求f(-2)与f(-1)。答:________________________________________________________________________________________________________________________________________________________________易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。———————————————第20天函数零点每日练|建议20分钟|16分目标:连接方程根和图像交点1.已知f(x)=x²-3x,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)=-4x-6,求f(1)、函数零点,并说明单调性。答:________________________________________________________________________________________________________________________________________________________________3.已知f(x)=x²-4x+3,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=3x-1,求f(1)、函数零点,并说明单调性。答:________________________________________________________________________________________________________________________________________________________________易错提醒先写等价变形,再检查分母、根式或参数限制。
第21天周测三:函数概念与表示周测|建议30分钟|20分目标:检验定义域、求值、分段与零点1.函数y=1/(x-2)的定义域是()。A.x>2B.x≥2C.x≠2D.x<22.函数y=-2x-2的变化情况是()。A.随x增大而减小B.先增后减C.先减后增D.为常数函数3.已知f(x)={2x+1(x<-2),-2x+1(x≥-2)},求f(-3)与f(1)。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=x²-8x+15,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________5.函数y=1/(x+4)的定义域是()。A.x>-4B.x<-4C.x≥-4D.x≠-4易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。
第22天单调性每日练|建议20分钟|16分目标:用区间描述函数变化1.写出函数y=-(x+2)²+1的单调区间与最值。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)=-2x+1,求f(-3)、函数零点,并说明单调性。答:________________________________________________________________________________________________________________________________________________________________3.写出函数y=-(x+1)²-3的单调区间与最值。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=-2x+2,求f(-1)、函数零点,并说明单调性。答:________________________________________________________________________________________________________________________________________________________________易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。———————————————第23天最大值与最小值每日练|建议20分钟|16分目标:从顶点式读取最值1.把y=x²+2x+1化为顶点式,并写出顶点、对称轴与最小值。答:________________________________________________________________________________________________________________________________________________________________2.写出函数y=x²的单调区间与最值。答:________________________________________________________________________________________________________________________________________________________________3.把y=x²+3化为顶点式,并写出顶点、对称轴与最小值。答:________________________________________________________________________________________________________________________________________________________________4.写出函数y=-(x-4)²+2的单调区间与最值。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。
第24天奇偶性每日练|建议20分钟|16分目标:用f(-x)建立对称语言1.判断函数f(x)=4x³+2x的奇偶性,并说明理由。答:________________________________________________________________________________________________________________________________________________________________2.判断函数f(x)=2x⁴+x²+2的奇偶性,并说明理由。答:________________________________________________________________________________________________________________________________________________________________3.函数f(x)=x²+2x是()。A.奇函数B.偶函数C.非奇非偶函数D.既是奇函数又是偶函数4.判断函数f(x)=3x³+3x的奇偶性,并说明理由。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。———————————————第25天图像平移每日练|建议20分钟|16分目标:理解解析式变化与图像移动1.说明y=(x+2)²+3可由y=x²怎样平移得到,并写出顶点。答:________________________________________________________________________________________________________________________________________________________________2.把y=-x²+8x-14化为顶点式,并写出顶点、对称轴与最大值。答:________________________________________________________________________________________________________________________________________________________________3.说明y=(x-3)²+4可由y=x²怎样平移得到,并写出顶点。答:________________________________________________________________________________________________________________________________________________________________4.把y=-x²+6x-9化为顶点式,并写出顶点、对称轴与最大值。答:________________________________________________________________________________________________________________________________________________________________易错提醒顶点、零点、单调区间都要写成坐标或区间,避免只凭图感。
第26天复合函数求值每日练|建议20分钟|16分目标:坚持由内向外1.已知f(x)=-2x+2,g(x)=x+2,求f(g(-2))。答:________________________________________________________________________________________________________________________________________________________________2.已知f(x)=3x+2,g(x)=-x-3,求f(g(1))。答:________________________________________________________________________________________________________________________________________________________________3.已知f(x)=3x,g(x)=-x,求f(g(-2))。答:________________________________________________________________________________________________________________________________________________________________4.已知f(x)=3x-3,g(x)=2x-3,求f(g(2))。答:________________________________________________________________________________________________________________________________________________________________易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。———————————————第27天函数性质综合每日练|建议20分钟|16分目标:一次写全定义域、零点、单调与最值1.求函数y=√x/(x-2)的定义域。答:________________________________________________________________________________________________________________________________________________________________2.写出函数y=-(x+4)²-4的单调区间与最值。答:________________________________________________________________________________________________________________________________________________________________3.用“截距、零点、增减”三种语言描述直线y=3x-2。答:________________________________________________________________________________________________________________________________________________________________4.求函数y=√x/(x-4)的定义域。答:________________________________________________________________________________________________________________________________________________________________易错提醒先确认定义域,再用解析式、表格和图像三种语言互相验证。
第28天开学作业规范每日练|建议20分钟|16分目标:用完整数学语言重做高频失分题1.解不等式5x>20,并用区间表示解集。答:________________________________________________________________________________________________________________________________________________________________2.解方程(x-7)/(x-3)=2。答:________________________________________________________________________________________________________________________________________________________________3.已知f(x)={2x+1(x<0),3x+2(x≥0)},求f(-2)与f(1)。答:________________________________________________________________________________________________________________________________________________________________4.解不等式(x-1)(x-2)>0。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。———————————————第29天月度综合复习每日练|建议20分钟|16分目标:按知识结构而非题目顺序复盘1.已知f(x)=x²-2x,求零点,并写出f(x)<0的解集。答:________________________________________________________________________________________________________________________________________________________________2.已知A={-2,3,4,7,8},B={0,1,2,4,8},求A∩B、A∪B与A\B。答:________________________________________________________________________________________________________________________________________________________________3.判断“x>3”是“x>0”的充分条件、必要条件还是充要条件。答:________________________________________________________________________________________________________________________________________________________________4.求函数y=√(x+2)/(x+1)的定义域。答:________________________________________________________________________________________________________________________________________________________________易错提醒先标注题型与限制条件,再选择最短解法。
第30天周测四:开学首月结业测周测|建议30分钟|20分目标:完成集合、逻辑、不等式与函数综合检验1.已知A={2,3,5,7},B={2,5,6,7},则A∩B=()。A.{2,3,5,6,7}B.{6}C.{3}D.{2,5,7}2.“x>4”是“x>0”的()。A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要3.函数y=1/(x-3)的定义域是()。A.x>3B.x<3C.x≥3D.x≠34.解不等式(x+3)(x-1)≥0。答:________________________________________________________________________________________________________________________________________________________________5.已知f(x)={-x-2(x<-1),-2x+1(x≥-1)},求f(-3)与f(1)。答:________________________________________________________________________________________________________________________________________________________________易错提醒先分清元素、集合与子集;区间端点先判断能否取到。
答案与解析答案区用于核对与订正,不用于边做边看。解析优先指出关键步骤、限制条件和检查点。第1天集合的含义与表示1.答案:A={0,1,2,3,4,5,6,7},共有8个元素。解析:x取整数,按端点能否取到逐一列出:{0,1,2,3,4,5,6,7}。2.答案:①正确;②正确;③正确。解析:①2是集合中的元素;②单元素集合{2}被作为一个元素列出;③空集是任何集合的子集。3.答案:a=2。解析:集合相等要求元素完全相同,因此a+2=4,解得a=2。4.答案:A={-5,-4,-3,-2,-1,0,1},共有7个元素。解析:x取整数,按端点能否取到逐一列出:{-5,-4,-3,-2,-1,0,1}。第2天集合之间的关系1.答案:①正确;②错误;③错误。解析:①{5}的唯一元素5属于右侧集合;②右侧集合列出的是数5而不是集合{5};③空集是其子集,但没有被列为元素。2.答案:A∩B={2,8},A∪B={-2,-1,1,2,4,6,8,9},A\B={-1,6,9}。解析:交集取公共元素,并集收集全部不重复元素,差集保留属于A但不属于B的元素。3.答案:①正确;②正确;③正确。解析:①8是集合中的元素;②单元素集合{8}被作为一个元素列出;③空集是任何集合的子
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