名校
解题方法
1 . 高斯是德国著名数学家,近代数学奠基者之一,享有“数学王子”称号,他和阿基米德、牛顿并列为世界三大数学家,用其名字命名的“高斯函数”为:设
,用
表示不超过
的最大整数,则
称为高斯函数,例如
,
. 已知函数
,函数
,则下列4个命题中,其中正确结论的选项是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1dffa925101e9e19720ee7295133d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be209b4634a4169d727f9fac198acce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbc6c3245906550c7641ce0471ac202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c583c96c958b9653dd9b66f7dbd7079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9bcf0effd771e30ab3399d2fcd9fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0bed8d403d5e4e232c8ac65ed87af5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259118296ced0cf932f15d08c3feee77.png)
A.函数 ![]() |
B.函数 ![]() ![]() |
C.函数 ![]() ![]() |
D.方程 ![]() |
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解题方法
2 . 定义
为不超过
的最大整数,如
,
,
,
.已知函数
满足:对任意
.
.当
时,
,则函数
在
上的零点个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf0a57f7f19bd5919e98bf0414fe850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/906d56fc8fcf6f56671376f442f429ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d54a0e82778f606d95a486835ac9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3420606c96b68fb884c839923fd20a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322eb46d949b9580bcc057d146b7fc58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790daaa89fc9d093f45023becf765697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3262781afb71e9dffc0b7fa1fe280cb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a31d2ac74f76e68064b4a74470d98b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8254a9fe09d5e3940ad8c1c1c62c105c.png)
A.6 | B.8 | C.9 | D.10 |
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名校
3 . 对任意的
函数
,都有
,且当
时,
,若关于
的方程
在区间
内恰有6个不等实根,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aedc1c8a16e306bcd6e5154f9ed6dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d203f81cd25b0e4b6e0f994d6a042b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21e1e80acd7ce4837f80e0257fa5357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016eff8c401a95d3eb5c7a785632293a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a08bd89cef4f0b1ae3d31a0a9f8f937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939f77278a5622a7dfc1759c721d4ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.(3,5) | B.(3,4) | C.[3,4] | D.[3,5] |
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解题方法
4 . 在棱长为1的正四面体
中,P为棱
(不包含端点)上一动点,过点P作平面
,使
,
与此正四面体的其他棱分别交于E,F两点,设
,则
的面积S随x变化的图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398a7cdc39e756d8f7f7ee1185579b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0924d39475d22d6ce04fbca2bfff2d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
解题方法
5 . 已知函数的定义域为
,
,且当
时,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322eb46d949b9580bcc057d146b7fc58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71bb7883ea87e6275472dbe14ee62357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bec8b1d8c2a5bd5095cb5a42719175.png)
A.当![]() ![]() |
B.当![]() ![]() |
C.若对任意的![]() ![]() ![]() ![]() |
D.若![]() ![]() |
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名校
6 . 已知函数
,若关于
的方程
有4个不同的实根
、
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c407c501c66aa304839fe61ff531d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c0d827ef8598ba6b70b34b2bdcd1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2961ff859ef31f3a71c69841dc64176f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f176de330ed3f93fee6f5a398de57c3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 已知函数
的定义域为
,值域为
,若存在整数
,
,且
,则
为函数
的“子母数”.已知集合
,函数
,
(
表示不超过
的最大整数,例如
),当
时,函数
的所有“子母数”之和为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760fb84e0ae1b32458d40b34ff7f145b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ad3c82177b7c734e7acb86377bb05e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c5cfaff14c20f8d8ce70eca6217286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14b5daa678b94a8d1aae2e717a3ee32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1623e7a791d9553a528171d62ae0af21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fe1e778c9e668594c42b77459328c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1116ef9a2f93e3eb01d87d9383d83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
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解题方法
8 . 已知函数
是定义在
上的偶函数,当
时,
则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62efb99971badf1c07858a6eb3828edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff3f6e7c4214fd1d24c58e2c3bdb834.png)
A.当![]() ![]() |
B.![]() |
C.存在![]() ![]() |
D.函数![]() ![]() |
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名校
9 . 设函数
的定义域为
,满足
,且当
时,
.若对任意
,都有
,则m的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/704eed612a90f7369fdec07a5ecdb686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f4e311edd359f2885c46f6e5752e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ad8f7a67af3d197d74c6b47a1d67ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9135161292cd899936b2972d90fde8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc83237d8c18e4745d112ffaf70fbb8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
10 . 已知函数
,若函数
有四个不同的零点
,
,
,
,且
,则下列结论中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233bcab9f8b3bcdd10c5d4828886d4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b946a8ec829a341aa6806a3eb0b9ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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