1 . 函数
,
的最大值为2,其图象相邻两个对称中心之间的距离为
,且
的图象关于直线
对称,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d970f130386db6275dcff7aed5c352e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acf33971fbe56418805438cd4a6e974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8973254e0eeb29a0add0e4677ce5337b.png)
A.函数![]() ![]() |
B.将![]() ![]() |
C.函数![]() ![]() |
D.函数![]() ![]() |
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2 . 已知椭圆
的右顶点为A,上顶点为B,椭圆的离心率为
,且
.
(1)求椭圆的方程;
(2)直线
与椭圆有唯一的公共点M(M在第一象限),此直线
与y轴的正半轴交于点N,直线
与直线
交于点
,且
,求直线
方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe2c533dbc23a34518f72f3cb14f330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f8b87e609e113f971649a6f80cf575.png)
(1)求椭圆的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ab208dec2049ac748031f92507a345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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3 . 下列说法正确的是( )
A.“![]() ![]() |
B.命题p:![]() ![]() ![]() ![]() |
C.在回归直线方程![]() ![]() |
D.对分类变量X与Y,随机变量![]() |
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解题方法
4 . 已知
,
,且
在点
处的切线与直线
垂直.
(1)求实数
的值.
(2)若
的图象经过原点,且
,当
时,
过点
的切线至少有
条,求实数
的取值范围.
(3)若
,且
,其中
,
均为正实数.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2dc19a078760863c7e681e59e0ec56b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8bb7e252de0e54ca82ad2c36ffba37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227d4946b9dbfdc8bef33b42b6a82572.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbab1a525c4451a43041defaa18a98f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9fab43d7bc79776880a47091152b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa70fa7eb86c3733e2c1f1c7d07dd802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7892b90ae2ff71fd827c95e5aabc3049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca96bf407a3ba46ef3c59c5eee4137c.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/803b13fac1480b428cb4ee4555852024.png)
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5 . 已知
(
为虚数单位),则复数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645a1c872e45c51b75aecbdcbbaec3e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
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6 . 设
,函数
,若
在区间
内恰有7个零点,则a的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed2d6262a9a962d8ec5f6dc3a4e0eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
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7 . 在各项均为正数的等比数列
中,
,且
成等差数列.
(1)求等比数列
的通项公式
和前n项和
;
(2)若数列
满足
,求数列
的前
项和
的最大值.
(3)求数列
的前
项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee517f82350d2e310144dd2af91e29e8.png)
(1)求等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4dba8dc297d15d5d5f076fbee316c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63d6814c9d3dd02930a6fba58bd8ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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8 . 若
的展开式中
的系数为10,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520bdfba462d011c68dff79b6b15d06c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be56e9bad873ec62fa3319414edcdfd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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9 . 在直三棱柱
中,
,
,
,
,该直三棱柱的外接球表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e240a6378adf6d23ebf9cc710c9bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c786b48d3aff4d2f73f83cc1a32a094a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 在
中,角A,B,C的对边分别为a,b,c,已知
,
.
(1)求:
的值.
(2)求:
的值.
(3)若
,求:
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0641fc2ab89de7e2b8d6a735a6cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db9740275ec6a2ea3ec4117685b24cb.png)
(1)求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e563e032dfdef69b0f357060c27bd4.png)
(2)求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6b7ed1c077a9f6cf24c762e269fce1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42190fdb24c6e918e06eb4a2ebf8856f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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