1 . 记
表示不超过x的最大整数,例如
,
,已知函数
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04d73c5b02fc71dabeec66648fc1601.png)
______ ;若函数
恰有3个零点,则实数a的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d54a0e82778f606d95a486835ac9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe433ad9925f6f9e4e1bdbe45969cd41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1579930f246f160d4ca9b3ce9807ab03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04d73c5b02fc71dabeec66648fc1601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4dd9318fe3da814b7ba4d1094966d5d.png)
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2023-02-25更新
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172次组卷
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5卷引用:辽宁省凌源市普通高中2022-2023学年高一下学期6月联考数学试题
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2 . 已知函数
在
上有且仅有2个零点,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bf19109eceb9764ecaf72cbf66e744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c195698ac387fe53b3b1e0248a1fcc92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-02-22更新
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1803次组卷
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6卷引用:辽宁省锦州市辽西育明高级中学2022-2023学年高一下学期期中数学试题
3 . 已知函数
(其中e为自然对数的底数),若存在实数
满足
,且
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892995c930758c8e5f5141b69c3ee0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e45e961dd36b8f85703c91f248da3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() |
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名校
解题方法
4 . 已知
(
且
).
(1)证明:函数
是偶函数;
(2)当
时,若函数
只有一个零点,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3536fe8307878a8c880b616f7e8021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a614be032089ad72971370afe0f04089.png)
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2023-02-19更新
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445次组卷
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2卷引用:辽宁省大连市一0三中学2022-2023学年高一下学期3月月考数学试题
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解题方法
5 . 函数
的部分图象如图所示.
的解析式;
(2)若函数
在区间
有5个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1213de3b9bc0a4899a1d4ff72cbaeb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbae0d22d931ac42b565c7990764a2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2023-02-17更新
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3卷引用:辽宁省沈阳市第二中学2023-2024学年高一下学期期中考试数学试卷
6 . 已知函数
.
(1)证明:当
,
在
上单调递增.
(2)若
恰有3个零点,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211ac418828e75ec77300976c7ff46e4.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c43f86ecb6bb6dfb3331b26d957d59d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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2023-02-03更新
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329次组卷
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2卷引用:辽宁省葫芦岛市绥中县利伟高级中学2022-2023学年高一上学期期末考试数学试题
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解题方法
7 . 已知函数
,满足
.
(1)求实数a的值,以及函数
的最小正周期(无需证明);
(2)求
在区间
上的零点个数;
(3)是否存在正整数n,使得
在区间
上恰有2022个零点,若存在,求出n的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e3ae21e2d34911cd66b28f636e7c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99e5d13b3287da4574043b21124c7c3.png)
(1)求实数a的值,以及函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
(3)是否存在正整数n,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277efd77034788493ecfa72a9d78e96a.png)
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2023-06-08更新
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360次组卷
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4卷引用:辽宁省重点高中沈阳市郊联体2022-2023学年高一下学期期末数学考试试题
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8 . 已知函数
,其中
,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db58afeac1cfe83233a8887e16f59b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08290af79305df59bc0a1fc2b7c4f7c5.png)
A.存在实数![]() ![]() |
B.存在实数![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
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9 . 已知函数
且方程
的6个解分别为
,
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20c1e5866f81c045a596079ac4a7671.png)
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4d0b818b4542324e59d2d7bdbc4cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee4747499f3160b1c6200b5363bb962.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/ee9b42973c53907f09f2de384c42fc5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20c1e5866f81c045a596079ac4a7671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b5f86bc510c923fa10c1e9d28a6ff8.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 设函数
,其中
,若只存在两个整数x,使得
,则a的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd954ca54c4b5f8bb977aa6aba508e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
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