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1 . 观察下列关于自然数的等式:
(1)
①
(2)
②
(3)
③
根据上述规律,写出你猜想的第
个等式(用含
的式子表示):______ .
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676ea1b90c909d2cce4624bc05d991d5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b093206b2c520d106b178b4fdcd0db13.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/397afc86d7b0034c4d040c5ffad35969.png)
根据上述规律,写出你猜想的第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2 . 如图,在
中,
,以
为直径的
与
交于点
,点
是
的中点,连接
,
.
(1)求证:
是
的切线;
(2)若
,
,求
的长;
(3)在(2)的条件下,点
是
上一动点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/27/a9f701a1-6500-44fb-8749-a45b587e7f41.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583effa35880ba5704dfc4ae4e48a6fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)在(2)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
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3 . 已知等式
,则下列变形一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f380b001c4a5b4ab9e6cda96abb9321b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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|
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4 . 已知关于x的方程
有两个实数根
,
(1)若
时,求
的值;
(2)若
,求实数m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda17b1c9496e2c8eedbf63eb939ef2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fef976a0230bdfe3bc758e93987ba8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6483c4c4e2815a2b35e87323882106bc.png)
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云南省昆明市第一中学2023-2024学年高一上学期入学考试数学试题四川省内江市第六中学2023-2024学年高一上学期入学考试(精英班)数学试题上海市徐汇中学2022-2023学年高一上学期期中数学试题(已下线)期中真题必刷常考60题-【满分全攻略】(沪教版2020必修第一册)
2023高三·全国·专题练习
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5 . 已知
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a0182d638d0d148f307cb675189be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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6 .
是
的边
上的一点,使得
,
是
外接圆上一点,
使得
,则
的值___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7749006d7e99bbec95b12e044bf8f87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4212e319578c23bbf23a505e1dda7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034b2a8f41d2ebd20ebbcb3f8e8243c0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/09c895c0-0246-43c3-8fce-2f566114f965.png?resizew=140)
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7 . 设a、b、c是
中角A、B、C所对的边的长.二次函数
在
时,取得最小值
,则这个三角形三个内角的度数分别为:A=_______ ;B=_________ ;C=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42503f3fca76323ed4264179adedbecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfdd459ebecd98f60e82caf60e190dd3.png)
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8 . 如图,在
中,
,
cm,
cm,D是BC边上一点,
cm,点P为边AC上一动点(点P与A、C不重合),过点P作
,交AD于点E.点P以1cm/s的速度从A到C匀速运动.
(1)设点P的运动时间为t(s),DE的长为y(cm),求y关于t的函数关系式,并写出
的取值范围;
(2)当t为何值时,以PE为半径的⊙E与以DB为半径的⊙D外切?并求此时
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af67d0503b1760510c0ed48b8eadcc72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69550d878381f6e8fb436e88638f070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2c3379d365743355e006f0de3d1eb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/b705c99b-65b5-4576-be10-4df6f813ce20.png?resizew=165)
(1)设点P的运动时间为t(s),DE的长为y(cm),求y关于t的函数关系式,并写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当t为何值时,以PE为半径的⊙E与以DB为半径的⊙D外切?并求此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2b669a87f18866b2e9560f7fe1776d.png)
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9 . 方程
的解有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2856f7c72d1641889e6a51cd5dd670.png)
A.0 | B.1 |
C.2 | D.多于2个 |
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10 . 若
(x、y是实数),则M的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e032cbfed165fe953d35a2ccf6ab7ec.png)
A.正数 | B.负数 |
C.零 | D.以上皆有可能 |
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