解题方法
1 . 在下列两题中任选一题作答
题①:设集合
或
,
,
.
(1)求
和
;
(2)若
,求
;
(3)若
,求实数
的取值范围.
题②:记函数
值域为集合
,函数
的定义域为集合
.
(1)求集合A;
(2)求
和
;
(3)求
和
.
题①:设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57353f4f4a42bd922a4045f64f1efcb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4829e84ccdc74dd118d988dbadaf324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f38fc907a460fb248629000a74614699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b3b3095294a92ab23f80620433fc53.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26bea4241ba4e54afb4172561be8734.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6ca098b764e0366d043b69ae9d8f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
题②:记函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ce2496b7da19fcfbe3a4e4999af38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d243e4a3be7907a6aaa01cf103fb884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求集合A;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb17a2a90cd479b604258d1258e9636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a964b99d839b459f7f14af1d512edcf4.png)
您最近一年使用:0次
2 . 如图,在半径为3的圆
中,
、
都是圆
的半径,且
,点
是劣弧
上的一个动点(点
不与点
、
重合),延长
交射线
于点
.
(1)如果设
,
,求
关于
的函数解析式,并写出定义域;
(2)当
时,点
在线段
上,且
,点
是线段
上一点,射线
与射线
交于点
,如果以点
、
、
为顶点的三角形与
相似,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/6bcaa0f8-5ea9-45fa-a4c6-be213150a2ef.png?resizew=148)
(1)如果设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bfc0387785bf3c60f75ed3d34cc98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531944b051cb8e0714370f050c5633f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818ae50f8482cb0a961d1b5ce2077c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fc28f622892dd18bbbac95d541acfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ed92a6827783abceb6357e9369117a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13366eb23da383f4cd8c74986ef07ff7.png)
您最近一年使用:0次
3 . 我们经常会采用不同方法对某物体进行测量,请测量下列灯杆
的长.
(1)如图(1)所示,将一个测角仪放置在距离灯杆
底部
米的点
处,测角仪高为
米,从
点测得
点的仰角为
,求灯杆
的高度.(用含
,
,
的代数式表示)
(2)我国古代数学家赵爽利用影子对物体进行测量的方法,在至今仍有借鉴意义.如图(2)所示,现将一高度为2米的木杆
放在灯杆
前,测得其影长
为1米,再将木杆沿着
方向移动1.8米至
的位置,此时测得其影长
为3米,求灯杆
的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/cbdc00db-7b5e-4bb3-9a51-9b4ca1951ecb.png?resizew=335)
(1)如图(1)所示,将一个测角仪放置在距离灯杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)我国古代数学家赵爽利用影子对物体进行测量的方法,在至今仍有借鉴意义.如图(2)所示,现将一高度为2米的木杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
名校
4 . 一方有难,八方支援.“新冠肺炎”疫情来袭,除了医务人员主动请缨逆行走向战场外,众多企业也伸出援助之手.某公司用甲,乙两种货车向某市运送爱心物资,两次满载的运输情况如下表:
(1)求甲、乙两种货车每次满载分别能运输多少吨物资;
(2)目前有46.4吨物资要运输到该市,该公司拟安排甲乙货车共10辆,全部物资一次运完,其中每辆甲车一次运送花费500元,每辆乙车一次运送花费300元,请问该公司应如何安排车辆最节省费用.
甲种货车辆数 | 乙种货车辆数 | 合计运物资吨数 | |
第一次 | 3 | 4 | 29 |
第二次 | 2 | 6 | 31 |
(2)目前有46.4吨物资要运输到该市,该公司拟安排甲乙货车共10辆,全部物资一次运完,其中每辆甲车一次运送花费500元,每辆乙车一次运送花费300元,请问该公司应如何安排车辆最节省费用.
您最近一年使用:0次
5 . 高一某班级有三位数学课代表甲、乙、丙,根据平时考试成绩统计甲、乙、丙的数学成绩(互不影响)在130分以上的概率分别为
,在本次开学考试中,据此概率求:
(1)三位数学课代表数学成绩都在130分以上的概率;
(2)事件A:“至少有一位课代表数学成绩在130分以上”的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd2963f779f909f39b36dd8f609f6b9.png)
(1)三位数学课代表数学成绩都在130分以上的概率;
(2)事件A:“至少有一位课代表数学成绩在130分以上”的概率.
您最近一年使用:0次
名校
解题方法
6 . 某水果店每天进货草莓200斤,每斤草莓售价15元,可以全部售完:如果草莓定价15.5元,则只能售出190斤,每斤每涨0.5元,销售量就会减少10斤,剩余的草莓在第二天以每斤10元的价格可以便宜出售并全部售完.如何给草莓定价,能使这批草莓销售金额最高.
您最近一年使用:0次
7 . 某物流公司为相邻两个货场运货,货场甲的每一箱货物重40千克,体积为2个单位;货场乙的每一箱货物重50千克,体积为3个单位.物流公司运送货场甲、乙的每一箱货物分别获利2.2元和3元.若物流公司的运货车每一次装运重量不超过37000千克,体积不超过2000个单位,那么运货车一次在货场甲、乙各装载多少箱,能使物流公司获利最大,最大利润是多少?
您最近一年使用:0次
解题方法
8 . 在以下三个条件中任选一个,补充在下面的横线上,并进行求解:
①函数图象过点
;
②函数图象开口向上,过点
,对称轴为
,且顶点到
轴的距离为
;
③函数的顶点为
,且函数
的图象与
轴交点间的距离为
.
已知二次函数
, .
(1)求函数
的解析式;
(2)若
时,函数
的图象恒在
图象的上方,求实数k的取值范围.
注:如果选择多个条件分别解答,按第一个解答计分.
①函数图象过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b89313f704068de63f59036fba7c26b.png)
②函数图象开口向上,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d599059e6b2c918ab15ee22611b6962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
③函数的顶点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931aa06ae0f752d3685499e7adf63e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
已知二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66ef59c3970f3581a5ea29e21fd564d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cf1ba54a1d09dcd2fd68add8a107bb.png)
注:如果选择多个条件分别解答,按第一个解答计分.
您最近一年使用:0次
9 . 某商店购进一批科学计算器,若按每个45元的价格销售,每天能售出30个,若每个售价每降低1元,日销售量则增加2个,设每个售价降低
元,这批科学计算器每天的总销售额为
元.
(1)写出
关于
的函数关系式;
(2)为了使这批科学计算器每天的总销售额不低于1750元,求每个售价最低为多少元?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1cf0f1f4dc140c8fa14c76c2e7c677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)为了使这批科学计算器每天的总销售额不低于1750元,求每个售价最低为多少元?
您最近一年使用:0次
10 . (1)求与向量
共线且满足方程
的向量
的坐标;
(2)已知
,
,
,求点
的坐标使得
;
(3)已知
,
,求:①
;②
与
夹角的余弦值;③确定
、
的值使得
与
轴垂直,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39ad2fcceb6087a0ac8e0e7be2d6d65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e4e3e7b6d9287ebec5a4f918507d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8383829fa007903bc1621ec4026b25eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a0e73bdf1e328a516d3274ea64d3af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3d4d29898452130e21f975495a9b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7eae5737f9bb6c9db01cced65de10c1.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff8a9e3b9a082bf9cd01a2de2710036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c5cf03275b86a74277ea49caf685b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3510a1e15b9649d7064c55337efb926a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fdd73ecf3bc52ca828fad97bff0547.png)
您最近一年使用:0次