14-15高三上·浙江温州·期中
解题方法
1 . 如图所示,在四棱锥P-ABCD中,底面ABCD为菱形,PA⊥平面ABCD,∠ABC=60°,E,F分别是BC,PC的中点.
![](https://img.xkw.com/dksih/QBM/2018/9/8/2027824454631424/2045581426794496/STEM/873e917bc33842f0a6775ac505305a13.png?resizew=117)
(1)证明:AE⊥PD;
(2)若AB=2,PA=2,求二面角E-AF-C的余弦值.
![](https://img.xkw.com/dksih/QBM/2018/9/8/2027824454631424/2045581426794496/STEM/873e917bc33842f0a6775ac505305a13.png?resizew=117)
(1)证明:AE⊥PD;
(2)若AB=2,PA=2,求二面角E-AF-C的余弦值.
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2018-10-03更新
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1036次组卷
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6卷引用:2015-2016学年青海省西宁十四中高二期中考试数学试卷
2 . 已知函数
,
.
(1)当
时,求曲线
在点
处的切线方程;
(2)当
时,求证:
在
上为增函数;
(3)若
在区间
上有且只有一个极值点,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/d91a5be9a83948cfa622e607964d9e2b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/892890cf091a4665a61733f322f9dc09.png)
(1)当
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/b1aa970af10c47f3badeaa3a7c9cb164.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/222ae947ccc640fdb2ab132ff29f8556.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/945d2c8987f64e7192d32ccd20c8576c.png)
(2)当
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/b6228f0395ee4c0099f7621ced8bd28e.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/10bd750131624df6b6e4201b69519f5a.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/19d920f8af534a8b83fb2a67a34d4e69.png)
(3)若
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/10bd750131624df6b6e4201b69519f5a.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/889e5b0dbe7a4942ada522b6b78117a8.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572477603610624/1572477609836544/STEM/19a6ae18860c4e908fa00614f78b5618.png)
您最近一年使用:0次
解题方法
3 . 已知
,求:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5bc7e33a6b0c8a6dda4252838843bb.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c91db6343cdf515b3e145f7c5d23f68.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476d20ada7164a8e676716461454ee45.png)
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12-13高三·江苏扬州·开学考试
名校
4 . 设函数
,函数
的零点个数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a344383f03467d2371d164e04da420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d8f3026afe116f7cd1ea381a50a052.png)
您最近一年使用:0次
2016-12-04更新
|
1208次组卷
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10卷引用:2016届青海省平安一中高三4月月考理科数学试卷
2016届青海省平安一中高三4月月考理科数学试卷2017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷1(已下线)2014届江苏省扬州中学高三开学检测理科数学试卷(已下线)2014届江苏省扬州中学高三开学检测文科数学试卷2015-2016学年湖北武汉华中师大一附高一上期中数学试卷2017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷2江苏省淮安中学2018届高三月考考试数学试题(已下线)2019高考热点题型和提分秘籍 【理数】专题8 函数与方程 ( 题型专练)人教A版(2019) 必修第一册 必杀技 模块综合测试第五章 函数应用A卷 单元达标测试-2022-2023学年高一数学北师大(2019)必修第一册
5 . 椭圆
左右焦点分别为
为椭圆
上任一点且
最大值取值范围是
,其中
,则椭圆离心率
取值范围( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f055e86704a06aec743b5e23e54440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45657dbe2e696d2986a8f79f7c734bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ce220c9f82e1d4f735967593ad408f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f572ff2025a6385673c4c3faa1713d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae76c22d2635d539fdd7cff8fcd9f5bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-05-10更新
|
848次组卷
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4卷引用:2016届青海省平安一中高三4月月考理科数学试卷
2016届青海省平安一中高三4月月考理科数学试卷2017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷12017届甘肃省肃南裕固族自治县第一中学高三上学期期末考试数学(理)试卷2(已下线)《2018届优生-百日闯关系列》数学专题四 专题四第六关