高一数学下学期期中试题38.doc

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1、ideological and theoretical qualities and practical working ability, and strive to build a contingent of league cadres with positive work style and high quality. Hold a regular meeting of the party secretary every fortnightly, arrange the work of the regiment, feedback the student information. Focus

2、 on training junior high school, junior high school secretary of the regiment branch to enable them to raise A firm political conviction, diligent and diligent learning spirit and practical and innovative work style.2016-2017学年度下学期期中考试高一 数学(文/理)试题一、选择题(本大题共12小题,每小题5分,共60分)1.下列四个结论,正确的是 ( ) 2.已知等差数列的

3、前项和为,若则( ) 3.已知等比数列中,各项都是正数,且成等差数列,则( ) 4.在中,分别为角的对边,满足则的形状为( )等腰三角形 直角三角形 等腰三角形或直角三角形 等腰直角三角形5.已知锐角的内角的对边分别为,则( )10 9 8 56.在等差数列中,表示数列的前项和,则( ) 7.在中,三边之比则 ( ) 2 8.已知其中则的大小关系是( ) 9.在正项等比数列中,则( ) 10.设等比数列的前项和为,若则 ( ) 11.已知分别为内角的对边,,且则 ( ) 12.设等差数列的前项和为,且则当取最小值时,的值为( ) 10 9 二、填空题(本大题共4小题,每小题5分,共20分)13

4、.如果一个几何体的三视图如图所示(单位长度:cm),则此几何体的表面积是cm2. 14.若数列的前项和,则数列的通项公式.15.设是正数,且成等差数列,成等比数列,则的最大值是. 16.已知是等差数列的前项和,若则. 三、解答题(本大题共6小题,共70分)17. (本题满分10分)求关于的不等式的解集.18.(本题满分12分)在中,角的对边分别为,满足.(1)求角的值; (2)若三边满足求的面积. 19.(本题满分12分)已知数列中,首项,.(1)求证:数列是等比数列;(2)求数列的通项公式以及前项和20.(本题满分12分)已知等差数列的前项和满足.(1)求的通项公式;(2)设求数列的前项和.

5、21.(本题满分12分)已知向量与向量共线,其中是的内角.(1) 求角的大小.(2) 若,求的面积的最大值,并判断取得最大值时的形状.22.(本题满分12分)已知数列是等比数列,为数列的前项和,且(1)求数列的通项公式.(2)设且为递增数列.若求证: 2016-2017学年度下学期期中考试高一数学(文、理)试题参考答案一、 选择题CDACA ACBBD BD二、填空题13. 14. 15. 16. 三、解答题17. (本题满分10分)求关于的不等式的解集.解:不等式可化为不等式对应一元二次方程的根为.4(1) 当即时不等式的解集为.6(2) 当即时,不等式的解集为.8(3) 当即时,不等式的解

6、集为.1.1018.(本题满分12分) 解:(1)在中,则由正弦定理,可得.2即即.4在中,又.6(2)由余弦定理可得:,即.10.1219.(本题满分12分)已知数列中,首项,.求证:数列是等比数列;求的通项公式以及前项和(1) 证明:又是以6为首项,以2为公比的等比数列.6(2) 解:由(1)知:.1220.(本题满分12分)已知等差数列的前项和满足.求的通项公式;设求数列的前项和.解:(1)在等差数列中.4(2) 由(1)知,则.1221.(本题满分12分)已知向量与向量共线,其中是的内角.(3) 求角的大小.(4) 若,求的面积的最大值,并判断取得最大值时的形状.解:(1).2即即.4

7、.6(2) 由余弦定理得:(当且仅当时取等号)的最大值是.9当取最大值时,又,是等边三角形.1222.(本题满分12分)已知数列是等比数列,为数列的前项和,且(1) 求数列的通项公式.(2) 设且为递增数列.若求证:解:(1)设等比数列的公比为.由已知:,解得或.3当时,当时,.6为递增数列不合题意.8当时,符合题意.12Strengthen the team connection, strengthen the knowledge education among the students (especially the first grade students), and promote t

8、he formation of good school spirit with the influence of the league members. All League branches should start with recommending outstanding students as the development objects of the League, take amateur league schools as the basis, conscientiously do a good job in the work of pre-league education,

9、league membership education, League members vanguard exemplary consciousness education, excellent league members education, etc. Under the premise of ensuring the quality, the development quantity of league members will increase steadily, and the ranks of league members in middle schools will be str

10、engthened constantly. It is planned to develop a group of new league members in April and mid-October.2. Carry out the regular meeting system of the League branch, and strengthen the ideological accomplishment and the training work in the field of business. League cadres are the backbone of the work

11、 of the League, and their quality directly affects the quality of the work. Therefore, they plan to use their extracurricular activities on Wednesday to open special training and other forms of study activities. To help the regiment cadres improve their ideological quality and professional skills, improve their9

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