名校
1 . 设
是定义在
上的奇函数,且当
时,
单调递减,若
,则
的值( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ec808ad60dbf016632ec816eaca1df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc8f775c0c874c4ea920136a91db8f.png)
A.恒为负值 | B.恒等于零 |
C.恒为正值 | D.无法确定正负 |
您最近一年使用:0次
2019-09-15更新
|
669次组卷
|
9卷引用:重庆市蜀都中学2020-2021学年高二上学期11月月考数学试题
重庆市蜀都中学2020-2021学年高二上学期11月月考数学试题山西省应县第一中学校2018-2019学年高二下学期期末考试数学(理)试题四川省眉山市眉山中学2017-2018学年高一10月月考数学试题(已下线)专题11.2 直接证明与间接证明(练)【文】-《2020年高考一轮复习讲练测》(已下线)专题12.2 直接证明与间接证明、数学归纳法(精练)-2021届高考数学(文)一轮复习讲练测(已下线)专题12.2 直接证明与间接证明 (精练)-2021届高考数学(文)一轮复习学与练(已下线)专题12.2 直接证明与间接证明、数学归纳法(精练)-2021年高考数学(理)一轮复习讲练测(已下线)专题12.2 直接证明与间接证明、数学归纳法 (精练)-2021年高考数学(理)一轮复习学与练甘肃省兰州市第五十中学2022-2023学年高三上学期第一次模拟考试数学(文科)试题
2 . 选修4-1:几何证明选讲
四边形
内接于圆,
,过
点作圆的切线与
的延长线交于点
.
![](https://img.xkw.com/dksih/QBM/2016/12/14/1619428618551296/1619428619206656/STEM/73dfe253840543358f9da8e3c9dc2e2e.png)
(1)求证:
;
(2)若
,
,
,求
的长.
四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/12/14/1619428618551296/1619428619206656/STEM/73dfe253840543358f9da8e3c9dc2e2e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6bcbc08e45c3f6c7fd17c6b8094277.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
3 . 选修4-1:几何证明选讲
如图,正方形
边长为2,以
为圆心、
为半径的圆弧与以
为直径的半圆
交于点
,连结
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573045552701440/1573045559246848/STEM/10b72ce5cdca4f2d9de8c9e5cabf9433.png)
(1)求证:
为
的中点;
(2)求
的值.
如图,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573045552701440/1573045559246848/STEM/10b72ce5cdca4f2d9de8c9e5cabf9433.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf96f750bccb1695930a92184185cfb.png)
您最近一年使用:0次
4 . 如下图,已知
是圆的两条弦,过
作圆的切线与
的延长线相交于
.过点
作
的平行线与
相交于点
,
,
,则
的长为
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/410e88edaa704cc2aafa020fdab6d1ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/99198ee3d10f480f85e3e29e45fa6cf4.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/32035ab912c84b8b9e7fe9c883e90c05.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/ab11233fab80413ba5e967a2a9a0aabb.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/80aeba8fcc3a4b9da58bfcffc9f3050a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/a58f6909945346bb9f1c33ecc27f950c.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/84b0c20104804ac8af472b87eb855dd3.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/b9a054c40a1d4558b17d652a983811d6.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/dc07eb9c046449df83bc74c7fabfd514.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/a09a8baf048d42ef8d3368f08005f7f6.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/9073842f7bde4e699c4b966ce6e60794.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019206893568/1573019212759040/STEM/410e88edaa704cc2aafa020fdab6d1ac.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 如图,设
是弦
延长线上一点,且
,过
作圆的切线于
,若
为线段
的中点,连结
交圆于点
,若
.
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572624032727040/1572624038928384/STEM/a9873329fd554a078bdb8cad244ee152.png)
(1)求证:
;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d03307f689eeb4ecb052c1f27bc9dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ace421df73f31a8e967a1c2c62bfba.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572624032727040/1572624038928384/STEM/a9873329fd554a078bdb8cad244ee152.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f7392aa403ca9e6d70c332c66a83f8.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572624032727040/1572624038928384/STEM/dc1fba21d0c84b999d7b255a4e8176fa.png)
您最近一年使用:0次
12-13高三·河南南阳·阶段练习
6 . 如图,在
中,
是
的角平分线,
的外接圆交
于点
,
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572696996036608/1572697002213376/STEM/a1d2f57cf6d74c838b101b1424485b37.png)
(1)证明:
;
(2)当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c71855e55064d1dc59eabe43e73a881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846071242f981289741ad19f4e7190cf.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572696996036608/1572697002213376/STEM/a1d2f57cf6d74c838b101b1424485b37.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679372e54c59c5cf67931b12b9833e02.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f7d9f5e71bfef8188b1216c1276c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2016-12-02更新
|
728次组卷
|
7卷引用:2015-2016学年重庆八中高二下阶段性检测五文科数学试卷
7 . 如图,
是
的一条切线,切点为
和
都是
的割线,
.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/9e9bab8eb07245379fc32b764f682bfd.png)
(1)证明:
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/fe907a13c78f4df2b148264b347f53c4.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/9486e164e97c42ba9b11d76488b2dc0d.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/70f2130fe3e44473bf8748e5f5c32c3b.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/fe907a13c78f4df2b148264b347f53c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625b4c2492d39e4f369cb5e724b00af1.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/9e9bab8eb07245379fc32b764f682bfd.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/96b71fce156143ea8d4a1bb55c16136f.png)
(2)证明:
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/0c69a9250af54dcb8e09d6ae3a52a9b7.png)
您最近一年使用:0次