已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5b37d4dd0e834611c6551ea13794c6.png)
(1)试确定
的取值范围,使得函数
在
上为单调函数;
(2)当
时,判断
和
的大小,并说明理由;
(3)求证:当
时,关于
的方程
在区间
上,总有两个不同的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5b37d4dd0e834611c6551ea13794c6.png)
(1)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7077fd2d7d74478891bfc360dc249f9a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17988cb33273869bda17fa256f968230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14be574d4eaf7f7e0d2b28ade7f3ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
(3)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ccc2e60c40781eca527195c5a721169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52edba6a1ad0064cf343a5f602567c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7077fd2d7d74478891bfc360dc249f9a.png)
2011·江西吉安·一模 查看更多[1]
(已下线)2011届江西省吉安市高三最后一次模拟考试文科数学
更新时间:2016-11-30 21:39:41
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适中
(0.65)
【推荐1】设函数f(x)=x2+bx-1(b∈R).
(1)当b=1时证明:函数f(x)在区间
内存在唯一零点;
(2)若当x∈[1,2],不等式f(x)<1有解.求实数b的取值范围.
(1)当b=1时证明:函数f(x)在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f935fa5d0ae1b208aff21aa468ecf8.png)
(2)若当x∈[1,2],不等式f(x)<1有解.求实数b的取值范围.
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适中
(0.65)
【推荐2】已知函数
.
(1)若
,求
的单调区间及相应区间上的单调性;
(2)证明:
只有一个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c653da955d33165d422068d74308cd6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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适中
(0.65)
【推荐3】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e4892080a918aa2127c09e8d4c28c9.png)
的周期为
,图象的一个对称中心为
,将函数
图象上的所有点的横坐标伸长为原来的2倍(纵坐标不变),再将所得图象向右平移
个单位长度后得到函数
的图象.
(1)求函数
与
的解析式;
(2)是否存在
,使得
?若存在,请确定
的个数;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e4892080a918aa2127c09e8d4c28c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a310a722934c0505bb8e69887f3f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de6d1af1984f890f1b9bd7dd2a1ab30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5cad2ac652c4be26176f75fcc5bfcb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ba12b7468d4a9089017a9f94b97f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
的个数;若不存在,说明理由.
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适中
(0.65)
【推荐1】已知函数
,其中
为常数,且
.
(1)当
时,求曲线
在点
处的切线方程;
(2)求函数
的单调区间;
(3)若函数在
上单调递减,请直接写出一个满足条件的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6410f0d771f3008aec7e2ff7cac08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aff8d9b6533ff319420cdc5e8740b04.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若函数在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879234adbae93aa72b7e101b3738d4e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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适中
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【推荐2】北京时间2021年7月23日19:00东京奥运会迎来了开幕式,各国代表队精彩入场,运动员为参加这次盛大的体育赛事积极做准备工作,当地某旅游用品商店经销此次奥运会纪念品,每件产品的成本为5元,并且每件产品需向税务部门上交
元(
)的税收,预计当每件产品的售价为
元
时,一年的销售量为
件.
(1)求该商店一年的利润
(万元)与每件品的售价
的函数关系式;
(2)求出
的最大值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbbbadd9eeff1da3d8a9cc12a278aaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73311ea57f957a87937a87360045e024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30adc4d9dac3a806dfe6779a9e493083.png)
(1)求该商店一年的利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e8c398265fbfaee7b804bb5beb2e94.png)
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名校
【推荐3】已知函数
,其中
.
(1)讨论函数
的单调性;
(2)若对于任意的
,
,且
,都有
成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9204383943d52a9270a8b859ef346db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7927930a0f387e1e1dd8e4e6bb5d8655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f221470565e9d1c5cedbf8537db47f76.png)
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【推荐1】已知定义在
上的增函数
,有下列命题:如果
,那么
.
(1)若
,判断原命题是否正确,并说明理由;
(2)试写出原命题的逆命题,并证明它是真命题;
(3)解不等式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29171d217e72b44bfcdb9509c7543d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac688bff3f9ea378f5e971da8d30aaa5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3cc66b811ad2395efe04d93b61c711.png)
(2)试写出原命题的逆命题,并证明它是真命题;
(3)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef760bbc1380d3bcc341e19d4ca673ad.png)
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适中
(0.65)
【推荐2】已知函数
,
.
(1)若函数
在区间
上不具有单调性,求实数
的取值范围;
(2)若
,设
,
,当
时,试比较
,
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61079d2aa81426ce3939384264454cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af825eaa7df1ee4ee36fc4336b2896c.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fea88619830db9faaeea461eca12394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed7a855f7b09f62ba9a1e24e61fa6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ad5b9b0fea45bd5ca0c076e2a7e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28cde854b0bbb32ef8b63437d668ad36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ac2dec993e1dcd5d8a848298ba0080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
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