1 . 已知向量
,则
在
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68f03adfeccc1e97b4f43775f276e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 人们发现,可以通过公式
来求方程
(
均为正实数)的正实数根.例如,方程
的正实数根为
,我们知道
是
的唯一正实数根,所以
,这里规定
.根据以上材料可得
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d63ca557a72dca6d8e6fd1292cc938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bd63762e6bc365c2fa3f9c2387e46c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad71356dc416a3d67dd0287fe1d08c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b863de54fe9b9d5191d23ff8e23ac42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad71356dc416a3d67dd0287fe1d08c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd779c16bcc1a432eee1bb797faea3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d70c1b3cd248c4d0c6c900dae59bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fddef4c3aade36a03ea32ba7ae8633a.png)
A.3 | B.6 | C.9 | D.4 |
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3 . 如图,在
中,
,
,
为
中点,沿
将
翻折至
的位置,使得平面
平面
,则三棱锥
外接球的表面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa0de170250a0c8b0d23044c4c3f274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c227ba037ced067913594586d0443e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc58409e4fedf0c4782f59d176ecf8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/21/a540432e-d77d-48db-99d0-face6d914ee9.png?resizew=338)
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4 . 求下列函数的导数.
(1)①
;②
;③
;
(2)①
;②
;
(3)①
;②
;③
.
(1)①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884e534313d810d5fc36b95f9fcaa08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e769299acbcc266a35ddd6848452f14.png)
(2)①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11b587eab7ca8cd4ec6d3dd1c8b4585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10408555b8279a4e9621d077acf7a97.png)
(3)①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/125bea9ef0d4a26ac65cacf66536b388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1454530ed83e70e2831ec0fd8d9d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e841547b8732a15323ab74fb109f360.png)
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解题方法
5 . 刻画空间的弯曲性是几何研究的重要内容.用曲率刻画空间弯曲性,规定:多面体顶点的曲率等于
与多面体在该点的面角和的差(多面体的面的内角叫做多面体的面角,角度用弧度制).已知正三棱台
中,
,棱
,
的中点分别为
,
.若该棱台顶点
,
的曲率之差为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e2d7c958e99bcd9d7f251c19ee3544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a9ad711b25c36dae0c2a2cedff9954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439cf259dd6137aa31bb99244a04ddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
A.![]() |
B.![]() ![]() |
C.直线![]() ![]() ![]() |
D.多面体![]() ![]() |
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6 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a18084f69518fdddd1242cf8b84a51.png)
(1)若b=0,求函数
在x=1处的切线方程;
(2)若b=2,求函数
的极值;
(3)讨论函数
的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a18084f69518fdddd1242cf8b84a51.png)
(1)若b=0,求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)若b=2,求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(3)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
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解题方法
7 . 已知数列
的前
项和为
,且
,则数列
的前100项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f3d1b22d630bc1a295b94e8f94d2f3.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/c8370a173854471a3eb27637993a3d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bdcb4751161b827640fab956df55831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f3d1b22d630bc1a295b94e8f94d2f3.png)
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解题方法
8 . 已知函数
,
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12959f65e9db83c446c35d3261a33171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb95686771706d856f67b6a7bc96f5a.png)
A.函数![]() ![]() |
B.函数![]() ![]() |
C.函数![]() ![]() |
D.函数![]() ![]() |
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9 . 已知在棱长为2的正方体
中,挖去一个以上下底面各边中点为顶点的四棱柱,再挖去一个以左右两侧面各边中点为顶点的四棱柱,则原正方体剩下部分的体积为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
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名校
10 . 函数
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d5e99c04d285c057e44af0b739d0b7.png)
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