1 . ![](https://img.xkw.com/dksih/QBM/2016/11/22/1573165553442816/1573165559619584/STEM/1395afa661df4667ab1c1edee4560458.png?resizew=155)
__________ .
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573165553442816/1573165559619584/STEM/1395afa661df4667ab1c1edee4560458.png?resizew=155)
您最近一年使用:0次
解题方法
2 . 已知集合
,则集合B不可能是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b43c3fdfb10412af2382a9308a0449.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 在
中,
,
,
是边
上一点.
![](https://img.xkw.com/dksih/QBM/2016/11/15/1573147881881600/1573147887845376/STEM/b64fcc1d7fdc42b291f1f9562d8e7ac2.png?resizew=282)
(1)求
的面积的最大值;
(2)若
,
的面积为2,
为锐角,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c7f0d0987ee427b7efbbf889b9bf16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62eccb33ea66c03222468628f74d8c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/15/1573147881881600/1573147887845376/STEM/b64fcc1d7fdc42b291f1f9562d8e7ac2.png?resizew=282)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
4 . 设函数
(
,
为自然对数的底数),若曲线
上存在
使得
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5482fd1eba114a414b4a7e8ee152724b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6a4781b020b879519321e05c299f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9863bdef554a67d2dcb5ddd6b4192d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
5 . 已知函数
(
为常数,
,
)在
处取得最大值,则函数
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc54bc56c16baa3643686b85a6130e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f56a20bc5fce6b02217627b42249854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43fc64524a70a95fda085dc92db80641.png)
A.奇函数且它的图象关于点![]() |
B.奇函数且它的图象关于点![]() |
C.偶函数且它的图象关于点![]() |
D.偶函数且它的图象关于点![]() |
您最近一年使用:0次
6 . 在
中,
的对边分别是
,
,且
.
(1)求证:
为等腰三角形;
(2)若
的面积为
,且
,求
边上的中线长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e98ef935fb49140d21e92bd18a43a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f090bf715903c758524fe791f479f2ba.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e609d7f5a3b904e30f43fbbc26033d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee75d1b742854ac7dd04caf3b6f91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
7 . 函数
的图象在
上恰有两个点的纵坐标为
,则实数
的取值范围是______________ .
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573115841888256/1573115847655424/STEM/0890b9e365d3443fbff6a1b488116c20.png?resizew=231)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573115841888256/1573115847655424/STEM/3d7f76bf98c84c7bba73043e60cfedc8.png?resizew=40)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573115841888256/1573115847655424/STEM/6c68b39db489429c87c640c01ec05ed8.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573115841888256/1573115847655424/STEM/b582631fd17c418e8c600ceb3eac1eb5.png?resizew=17)
您最近一年使用:0次
8 . 已知
是三角形的最大内角,且
,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d1a34ae2b8c77f8d7e355c6d1d667e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1f15f39e8da357e504dbff7c887279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c12ca16159d1383468a1cc614b225105.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 若对任意
,存在
,使
成立,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f484f1e495112c8b4635219422c13a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501d3b69a1af0c28417d4727d3d89040.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc71b0c5344d31009c869adfc62d0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1da9a443244d97147933aad084cab9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f484f1e495112c8b4635219422c13a0.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . 在
中,内角
,
,
的对边分别是
,
,
,且
.
(1)求
;
(2)设
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc41c63a6da07b62717cd10028585a22.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3570e05dacebb240a0814b2bccbc701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1928a5cf0d84ddfe836279cbffc6f4dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
您最近一年使用:0次