期中测试二
能力提升卷
班级___________姓名___________学号____________分数____________
(考试时间:120分钟试卷满分:150分)
一、单项选择题:(本题共12小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的.)
设等差数列{
an}的前
n项和为
Sn,已知13
a3+
S13=52,则
S9=( )
2020-09-10更新
|
1059次组卷
|
13卷引用:2020届江西省九江市高三第一次模拟数学理科试题
数列{
an},{
bn}为等差数列,前
n项和分别为
Sn,
Tn,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716ac74d7fdc714557f9d7b4956d92fb.png)
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8531056adc0ce2c28a78d1e4e1fc8f.png)
=( )
2020-09-10更新
|
1464次组卷
|
9卷引用:2011-2012年广东省揭阳一中高二上学期第二阶段文科数学
2017-08-01更新
|
2452次组卷
|
31卷引用:2010年安徽省师范大学高一下学期期中考试试题
2019-05-18更新
|
477次组卷
|
2卷引用:【校级联考】江西省赣州市五校协作体2018-2019学年高一下学期期中联考数学试题
已知等差数列{
an}的前
n项和为
Sn,
a1=﹣3,2
a4+3
a7=9,则
S7的值等于( )
2020-09-10更新
|
2645次组卷
|
11卷引用:2020届安徽省合肥市高三第一次教学质量检测数学(理)试题
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7538c07fa8dcfeecc0de606952c75b40.png)
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
一定是(
)
A.等边三角形 | B.直角三角形 | C.锐角三角形 | D.钝角三角形 |
2020-09-09更新
|
13次组卷
|
1卷引用:期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)(已下线)期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)
2020-02-17更新
|
844次组卷
|
4卷引用:2020届湖北省武汉市武昌区高三元月调研考试文数试题
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
的内角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
所对的边分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7ab448ba892490faa9ca4023db9e2f.png)
,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
的面积等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
的值为(
)
2020-08-24更新
|
2065次组卷
|
27卷引用:山东省菏泽市第一中学八一路校区2018-2019学年高一5月月考数学试题
等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ab128820f8db987e399ed426320684.png)
,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19f20340437ad6237185e11f23e5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b2385a78ff551c3c13d1ce9e21b602.png)
,则(
)
A.n的最大值是50 | B.n的最小值是50 |
C.n的最大值是51 | D.n的最小值是51 |
2020-09-09更新
|
357次组卷
|
6卷引用:上海市青浦区2019届高三二模数学试题
已知锐角△
中,角
对应的边分别为
,△
的面积
,若
, 则
的最小值是
2018-07-05更新
|
2540次组卷
|
6卷引用:山西省平遥中学2017-2018学年高一下学期期末考试数学试题
2019-04-15更新
|
1554次组卷
|
3卷引用:【市级联考】河北省石家庄市2019届高三毕业班模拟考试一(B卷))文科数学试题
设
a,
b,
c为
ABC中的三边长,且
a+
b+
c=1,则
a2+
b2+
c2+4
abc的取值范围是(
)
2020-09-09更新
|
625次组卷
|
8卷引用:湖南省永州市2018-2019学年高一下学期期末考试数学试题1
二、填空题:(本题共4小题,每小题5分,共20分.)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
中,角
A,
B,
C的对边分别为
a,
b,
c,则满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825793ebd4bb376a09621f163ac990a9.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c43fed4777b56c8124e55df01a8bdfd.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b86d43790babcdbbdc03493ee70928.png)
的三角形解的个数是
______.
2020-02-18更新
|
3128次组卷
|
5卷引用:河南省驻马店市2019-2020学年高二上学期期末数学(文)试题
________.
2017-04-21更新
|
262次组卷
|
3卷引用:2016-2017学年湖北省襄阳市四校(襄州一中、枣阳一中、宜城一中、曾都一中)高二下学期期中联考数学试卷
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
是锐角三角形,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
的对边.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708929b0c4f51df55db33092d887a926.png)
的取值范围是
_________.
2020-04-08更新
|
665次组卷
|
4卷引用:2019届湖南省怀化市高三第三次模拟数学(文)试题2019届湖南省怀化市高三第三次模拟数学(文)试题(已下线)期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)(已下线)微专题07 三角形中的范围与最值问题(1)-【微专题】2022-2023学年高一数学常考点微专题提分精练(人教A版2019必修第二册)(已下线)专题15 三角形中的范围与最值问题-2
已知首项为2的数列
的前
项和
满足:
,记
,当
取得最大值时,
的值为__________.
2018-03-31更新
|
1166次组卷
|
6卷引用:湖南省三湘名校教育联盟2018届高三第三次联考数学(文)试题
三、解答题:(本题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤.)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
中,角
A,
B,
C的对边分别是
a、
b、
c,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77f343db00ca86953538b06e2b56062.png)
(1)求
A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19cee5b295fbbba23a8b55da6b98320.png)
,
M是
AB的中点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10025f6bb62bc63f1ac271b378e62f2.png)
.
2020-04-09更新
|
433次组卷
|
5卷引用:山西省2019-2020学年高三下学期3月适应性调研数学(文)试题
已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
的前
n项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f471fee48f0f3b06b197d3a4817441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fe2a6fb4e0ddd3be0bd6daa54fcba51.png)
且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba2be31d987108fba76dbca933b92d8c.png)
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
为等差数列:
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c22ef113109cd4d3732ac53099c386f7.png)
的前
n项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
.
2020-09-09更新
|
26次组卷
|
1卷引用:期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)(已下线)期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)
如图所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9127d7384479cfc844a7172a14d14d8c.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc3f0ff8d944ac32bf96225e85e6908.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e7f748d88b4eadfd1643c6b31fdf08.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/37d1e9da-3b59-43c6-bfb0-5f6ce2e55269.png?resizew=271)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680f5d2533547bd9302a8caf496f4b88.png)
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
边上的中线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
的值.
2020-03-29更新
|
734次组卷
|
6卷引用:2020届陕西省西安市西北工业大学附中高三下学期3月月考数学(理)试题
已知正项等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd26450ddd732151c404aba6078e848.png)
,数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07ee1fd9cc31c46e4aa7500d074d958.png)
.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
的通项公式;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5827b8ad16bb9a8c78db43ced3c827e2.png)
求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
项和
.
2020-09-09更新
|
279次组卷
|
5卷引用:湖北省荆门市龙泉中学2020届高三下学期高考适应性考试(一)理科数学试题
已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce97e30e9baa1f3c2017c9d81b7da19b.png)
都是等差数列,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
.数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6e0dbc392d7c83bae02488313b4676c.png)
.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
的通项公式;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
是等比数列;
(3)是否存在首项为1,公比为
q的等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
,使得对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b55ef1b79628633d81b4a6a70108a9.png)
,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e695ca26cf09a7327c6672ae07aabbbe.png)
成立?若存在,求出
q的取值范围;若不存在,请说明理由.
2020-03-05更新
|
421次组卷
|
2卷引用:2020届江苏省启东市高三下学期期初考试数学试题
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8cf2f53ce5bd450273f77054958a838.png)
.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
的值;
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
中,角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
的对边分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9eee17f6780d25aa36b539f553dee72.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
的面积是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
的周长.
2020-09-09更新
|
49次组卷
|
1卷引用:期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)(已下线)期中测试二(能力提升)-2020-2021学年高二数学单元测试定心卷(人教版必修5)