名校
解题方法
1 . 已知函数
的部分图象如图所示,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/cf18cf10-b4ed-40c7-8a6a-26e7315445cf.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81a258e5fa6055295a23fe83ac1597b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/cf18cf10-b4ed-40c7-8a6a-26e7315445cf.png?resizew=150)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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解题方法
2 . 已知抛物线:
的焦点为
,点
为抛物线
上一动点,点
,则( )
A.抛物线![]() ![]() |
B.![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.过![]() ![]() ![]() ![]() ![]() ![]() |
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3 . 如图,在四边形
中(如图1),
,
=
分别是边
上的点,将
沿
翻折,将
沿
翻折,使得点
与点
重合(记为点
),且平面
平面
(如图2)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/1ccde777-bef6-4ca6-8be5-8b1749599f33.png?resizew=293)
(1)求证:
;
(2)求二面角
余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60663fe74a7d36de97b28a37a68e5812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d2431ed9c0e3c333b77882b76f9cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532b3981b59bbc3bd1a3fe16f92a3027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0436efefa53aad714565ab2ba7ff90fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81641a4693e44c4194875790bcccb58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666e154cbea71fa13440a81dbfa002c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012bd742142c39a1c1de8830e778bb70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/1ccde777-bef6-4ca6-8be5-8b1749599f33.png?resizew=293)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288142497e082cae14f8f145243da9f3.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afb434b4ab457497962d27dd015d094.png)
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4 . 记数列
的前
项和
,对任意正整数
,有
,且
.
(1)求数列
的通项公式;
(2)对所有正整数
,若
,则在
和
两项中插入
,由此得到一个新数列
,求
的前91项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11653ad7a67a4f58d7574aaa3ca1a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)对所有正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06dba709f98c33b3d9f00841de766977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217b927efe12a98e1082ecd7f035b921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693ca4c6b45d64e52e1e7ce8e1b64020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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解题方法
5 . 集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299ec9857af884407e26af0b21f1468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c34c8ba5ebdbe58ef8bdf2731e1f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . (1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a48c647ad5efb0e0469eb24e994bda0.png)
______ .
(2)若
,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d6ab606fb600ac1ce35f38de14a1a6.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a48c647ad5efb0e0469eb24e994bda0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57fd7d45d159443d6eef5b368d64216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d763b6c57d61d71b85878027d3eacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a6aba7ca7e3483192544c43acd7957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d6ab606fb600ac1ce35f38de14a1a6.png)
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7 . 已知函数
在区间
上单调,且
,
恒成立,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff59684d120928b8cd2361adfa1d3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eba14cb485ccb3ddc9d7aeed4d75a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b514e34e830975e368f7b3c5ac7262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28ed54e6ec5dee8074aaa154c2785a2.png)
A.存在![]() ![]() | B.![]() |
C.![]() | D.![]() |
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8 . 已知函数
,则函数
的减区间是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9166eaa4ce552b38dda20781aeb2c70d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
9 . 已知函数
,下列结论中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045ffd09f88cdb2bd2a9becce8fd69d3.png)
A.函数![]() ![]() |
B.直线![]() ![]() |
C.函数![]() ![]() |
D.函数![]() |
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10 . 已知数列
满足
,记数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780019495df34d40fff9d8f31bbf3e74.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec0e5e3cefcd15faed8eddaf54f46554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780019495df34d40fff9d8f31bbf3e74.png)
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