解题方法
1 . 已知函数
,若对任意的
恒成立,则正实数
的取值可以为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34e563fb21d07910bbf3bf674d2e6c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7b89b5b274503b3f82d31822dd6ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知函数
.
(1)当
时,求
的图象在
处的切线方程;
(2)若函数
存在单调递减区间,求实数a的取值范围;
(3)设
是函数
的两个极值点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ce03991003cf95131016408f2d4ce1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d06e33d079ac1649ee5eea8f61de7cf.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fcad362a59670d52247deb8af650927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648d45539fbee959eabbf7a6c01f6982.png)
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3 . 对于正整数n,
是小于或等于n的正整数中与n互质的数的数目.函数
以其首名研究者欧拉命名,称为欧拉函数,例如
(
与
互质),则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7cc0ad7521b5771950aea983f0c1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7cc0ad7521b5771950aea983f0c1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c9e69c7d5a3d7a5633a373a8a39544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786c6406780167f9744d0f9e9682e471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
A.若n为质数,则![]() | B.数列![]() |
C.数列![]() | D.数列![]() |
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吉林省通化市梅河口市第五中学2024届高三三模数学试题湖北省宜荆荆2024届高三下学期五月高考适应性考试数学试题 (已下线)高二数学期末模拟试卷02【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北师大版2019选择性必修第二册)
4 . 已知
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa6c9b06a828278e6d33c1f3bcd7420e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
5 . 已知函数
.
(1)当
时,
恒成立,求
的取值范围;
(2)设
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d608407a12846ee52845751b84471c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385d802db44c85df39ed0eb07ecce90e.png)
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6 . 刻画空间的弯曲性是几何研究的重要内容,用曲率刻画空间的弯曲性,规定:多面体顶点的曲率等于2π与多面体在该点的面角之和的差,其中多面体的面的内角叫做多面体的面角,角度用弧度制.例如:正四面体每个顶点均有3个面角,每个面角均为
,故其各个顶点的曲率均为
.如图,在直三棱柱
中,点A的曲率为
,N,M分别为AB,
的中点,且
.
平面
.
(2)证明:平面
平面
.
(3)若
,求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7b2dd83fcacead6b6c7733503dfcee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e79fd1a2ba4245c902b45bf9fc5c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c25c4259d935d6e6fabe5c3fc1f43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0b52ab4b32b650e57f9233c1b9bd30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c5282bc1ea20767a6c092c22c761ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95c6dbe3dde6e5b84a240b2baf87201.png)
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解题方法
7 . 已知
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beff0aabd2bb1fe031b658c55258ece8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db30ad779d5ff572a140cd6e3b0d3c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d75280bf1f91ea4d4d806d604d36977.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 已知椭圆:
的左、右焦点分别为
,点
是
轴正半轴上一点,
交椭圆于点A,若
,且
的内切圆半径为1,则该椭圆的离心率是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b24214f111f7c6d2b64e53ad970438b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1290d0c55649a0fb9608007d5db5b047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc19b3c838f96ad50f4450d0e76eb0fc.png)
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解题方法
9 . 已知正数a,b,c满足
为自然对数的底数,则下列不等式一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14795f0a41bc144cc1f99d948dfc30b0.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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