解题方法
1 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d1019246a653a14a5dc1bdf9d3487d.png)
(1)若
,证明:
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d1019246a653a14a5dc1bdf9d3487d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8612c32279bef2fc914c685f475a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369100ccd44feaa77e5f119ea949a879.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d4da2b54bf28ff8346a73e11065459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 已知函数
,
.
(Ⅰ)当
时,解不等式
;
(Ⅱ)若任意
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036fd1de458f1b71cd921b4008e28733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f5f4525b21aeaacaa2920840fdfea9.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
(Ⅱ)若任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2017-04-22更新
|
208次组卷
|
2卷引用:福建省仙游金石中学2018届高三上学期期中考试数学(文)试题
解题方法
3 . 已知函数
.
(1)若
恒成立,求实数
的最大值
;
(2)在(1)成立的条件下,正实数
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3b743cb215e038746703dc9039f9c4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29d8a43948e858bc50fa6bca8772842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)在(1)成立的条件下,正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e8762c14ba07710784f3a0d554d38ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b0e403c5f00d0357d3fa30d6c2717c.png)
您最近一年使用:0次
4 . 已知实数
,设函数
.
(Ⅰ)证明:f(x)≥2;
(Ⅱ)若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eda48853e8bdb7e266370b4e0d5a258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ec1b2b618517164e124afe15a30a7a.png)
(Ⅰ)证明:f(x)≥2;
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b2717d5d8596e949a34fb7546bbc79.png)
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5 . 已知函数
.
(Ⅰ)解不等式
;
(Ⅱ)设正数
满足
,若不等式
对任意
都成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f3e8251d2e3ee394e530b97b396bd2.png)
(Ⅰ)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cdcf7c939a3de2615e1c453c48bae01.png)
(Ⅱ)设正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b23c05ea89b5750b60da7885706661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56fc4bcb292d3a4206c7b4e6bd335de.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572434216075264/1572434222235648/STEM/e4f3956752e14706b154c64e477512dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
6 . 已知函数
的最小值为
.
(Ⅰ)求
的值;
(Ⅱ)若存在两个正数
使得
,求
最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d87a6b19e1a6735a3db7286dd84b0e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)若存在两个正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619cb1c21853c706251dc995602cf0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88ea271b3352d75008832f129d39dc0.png)
您最近一年使用:0次
7 . 选修4-5:不等式选讲
已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62cab691515f1a21a4b57fc3bf107332.png)
(Ⅰ)若
,求
的解集;
(Ⅱ)对任意
,任意
,
恒成立,求实数
的最大值.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62cab691515f1a21a4b57fc3bf107332.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a526295479b18c9382a74db2e8612a.png)
(Ⅱ)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664d9ee5169a59edafcf497e523ed3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0be07495dbc744e1ecabac66f748218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf37de61b47595ee9cee74367a6cb21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
解题方法
8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f114bc954855ceaf3eddceb97c2917.png)
.
(Ⅰ)证明:
;
(Ⅱ)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f114bc954855ceaf3eddceb97c2917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65db8c3b6f4459fc2d333352f7f5b3bd.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/805cfa0f548516294820e3788b69655e.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/170a627f4b49c8784a8f1c1fefc4cf38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2017-04-20更新
|
253次组卷
|
3卷引用:福建省莆田第六中学2017届高三下学期第一次模拟(期中)数学(理)试题
9 . 设函数
.
(1)若
,
,证明:
;
(2)若
,求a的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/321b707a16da47e993b1610d71906aff.png)
(1)若
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/20c2240065a6498690addf4a22d4dbd9.png)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/1f03e7ed0cf24c27a12273950183af9a.png)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/733bcb579876403a990aaeb93e8b341d.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/caef1d3d5ccd41628d241c5cdcd5b97f.png)
您最近一年使用:0次