2010·浙江·一模
解题方法
1 . 已知函数![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/bb267d8852d6434d908feeeec0175a8f.png?resizew=234)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
.
(Ⅰ)求函数
的单调区间;
(Ⅱ)若函数
的图像在点
处的切线的斜率为
,问:
在什么范围取值时,对于任意的
,函数
在区间
上总存在极值?
(Ⅲ)当
时,设函数
,若在区间
上至少存在一个
,使得
成立,试求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/bb267d8852d6434d908feeeec0175a8f.png?resizew=234)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/5e64765754e44a58816d5b46210b9a89.png?resizew=12)
(Ⅰ)求函数
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/eabb122f339b4673a115fe5493b27314.png?resizew=36)
(Ⅱ)若函数
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/9961606044494457a31de3585628468b.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/d3893716caf54b31b91c6acfd4d61ba2.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/20d90ee520a44200b95624553199767f.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/37649954997f4e31818df3de7b59f01a.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/9409476e3b564e78a828efda9522c030.png?resizew=52)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/96a5d13fb62749ba9ae7c80cef0bb276.png?resizew=172)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/18cc7564ddac4050b8a9f2badb6d14d2.png?resizew=32)
(Ⅲ)当
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/f1fb9026bfef46ca8ad18667df9ff3dc.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/35e2ec5761734780b95ccd82108c3ac9.png?resizew=184)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/02f0912425bf4d37a37ab981974e9134.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/3f65fc70aa3649b0b80daee804cd5bea.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/671a0b8b01324a4082b28231e1c55ee2.png?resizew=95)
![](https://img.xkw.com/dksih/QBM/2011/12/31/1570670850367488/1570670856126464/STEM/6ae026eb70fb47c6b9379a339c371c56.png?resizew=16)
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2 . 已知函数
(
为常数),函数
.
(1)若函数
有两个零点,求实数
的取值的范围;
(2)当
,设函数
,若
在
上有零点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adcd74b99f824e4b2a5e10256deb181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f490a2f04be198d2e9f61a36a601e61d.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d22b4beb798f9b1b12b9036e725f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b4e7aafb01b2104404fc9f0e5205c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
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名校
3 . 如图,OM,ON是两条海岸线,Q为海中一个小岛,A为海岸线OM上的一个码头.已知
,
,Q到海岸线OM,ON的距离分别为3 km,
km.现要在海岸线ON上再建一个码头,使得在水上旅游直线AB经过小岛Q.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572660084457472/1572660090683392/STEM/b0d8c5c250344947b5efae4081eaa58e.png)
(1)求水上旅游线AB的长;
(2)若小岛正北方向距离小岛6 km处的海中有一个圆形强水波P,从水波生成t h时的半径为
(a为大于零的常数).强水波开始生成时,一游轮以
km/h的速度自码头A开往码头B,问实数a在什么范围取值时,强水波不会波及游轮的航行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6449e5045458b196b1af56b25d585b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db82973fe1165d3ab158599b553fbe4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ae5017d0f9e9f8f82f17c961da1b71.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572660084457472/1572660090683392/STEM/b0d8c5c250344947b5efae4081eaa58e.png)
(1)求水上旅游线AB的长;
(2)若小岛正北方向距离小岛6 km处的海中有一个圆形强水波P,从水波生成t h时的半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73ba89133141567dd9e19ee90d9fd81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff92696e5d9cda77350d5ab75063cec.png)
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解题方法
4 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb8d0c27865fd4a00c908b4defe02f3.png)
(1)求关于x的不等式
的解集;
(2)若
在区间
上恒成立,求实数a的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb8d0c27865fd4a00c908b4defe02f3.png)
(1)求关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57458464618fcf619375a93d3c66d69.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abeeaf0f4d654733aa8db83da28641ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
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解题方法
5 . 已知函数
.
(1)当
时,求不等式
的解集;
(2)对于任意的正实数m,n,且
,若
恒成立,求实数a的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447ea620900858bad3b916dec0f091a7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188281cc0c7af6e95c32b9bbb94ffc21.png)
(2)对于任意的正实数m,n,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a548d0b3ceef145f2f1583d02d70f769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df45c04a9ee9f91fbdb04fd68b64befd.png)
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6 . 设f(x)=|x-a|+|x-2|,其中a<2,已知f(x)图像关于直线x=
对称
(1)求a的值,并作出函数f(x)的图像,
(2)是否存在实数m,使得不等式f(x)<m(x2-4x)的解集包含区间 (
,3)?若存在,求m的取值组成的集合;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求a的值,并作出函数f(x)的图像,
(2)是否存在实数m,使得不等式f(x)<m(x2-4x)的解集包含区间 (
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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7 . 已知函数
.
(1)若
,使得
成立,求
的范围;
(2)求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa02b8c401af4fd18b6b18059a0fbe37.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e7d4694604abe0ebc36818ee192a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca5f62e36c402a39ad53d1095d7028a.png)
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8 . 设函数
,不等式
的解集是
.
(1)求实数
的值;
(2)若
对一切
恒成立,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda0d32c2d821c5f9d967f0c9470bc68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d24227741bf427e6bd73490baf3c3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa85800cca03f7451f5cf2f9879cc0bc.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bcb69e181661c9b1803a83004adcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
9 . 设不等式
的解集为M,且
.
(Ⅰ)试比较
与
的大小;
(Ⅱ)设
表示数集A中的最大数, 且
, 求h的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a63d0250e2d28d393ed1ec25c42cf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf8ef905453bbfc1e48984e87da9b9b.png)
(Ⅰ)试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdaba8b1591046933f2f725b6b1bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73fefa3b1d5df3a688c1e5de71b659c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853b67d08166ff52b1a03effd8802176.png)
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10 . 设不等式
的解集为
,且
.
(1)试比较
与
的大小;
(2)设
表示数集
中的最大数,且
,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9942656b065269633af3859d6106b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fcab2d899b5dfb8d8230e0f84fd5f3.png)
(1)试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdaba8b1591046933f2f725b6b1bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74dec63e6d30a41fcc8972397875bf46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fde9b9777705297bd121a2701390ecbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
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