1、宁夏银川一中2020-2021学年高二数学上学期期末考试试题(GAC,无答案)(满分120分,考试时间120分钟)一选择题(本大题共40小题,第小题2分,共80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)1不等式的解集为( )A(-1,0)(0,+)B(-,-1)U(0,1)C(-1,0)D(-,-1)2在某次测量中,在A处测得同一平面内的B点的仰角为60,C点的俯角为70,则BAC等于( )A10B50C120D1303在ABC中,a=6,b=4,C=30,则ABC的面积是( )A12B6CD4在ABC中,a、b、c所对的角分别为A、B、C,若a=2,A=,B=,则b等于( )AB
2、C1D5已知数列an的通项公式为an=(-1)n+1(n2+1),则a3等于( )A-10B10C4D-46已知数列an,a1= -2,an+1=2+,则a3的值为( ) AB6CD7在等差数列an中,已知a3=0,a1=4,则a6等于( )A-4B-5C-6D-78在等差数列an中,已知a1+a9=10,则a5的值为( )A5B6C8D109数列an的前n项和为Sn,若,则S5等于( )A1BCD10已知-1,x,-4成等比数列则x的值为( )A2BC2或-2D11数列1,的一个通项公式an是( )ABCD12一数列an中,a1=3,a2=6,an+2=an+1-an,则该数列的第5项是(
3、)A6B-3C-12D-613若,则( )ABCD14函数y=的定义域为( )ABCD15关于x的不等式x2-x-53x的解集是( )Ax|x5或x-1Bx|x5或x-1Cx|-1x5Dx|-1x516若n0且m+n0,则下列不等式中成立的是( )A-nmn-mB-mn-nmC-n-mnmD-nmn10m38若ab,cd,则下列不等式成立的是( )Aa+db+cBacbdCDd-a0;-x2-x5;ax22;x3+5x-60;mx2-5y0.其中是一元二次不等式的有( )A5个B4个C3个D2个40已知等差数列an中,a2=-9,则an为( )A14n+3B16n-4C15n-39D15n+8
4、41What is the first three terms of the sequence Tn=2n+4?? ( )A1,2,3,4B4,3,2,1C6,8,10,12D12,10,8,642Which of the following sequence is arithmetic progression? ( )A62,59,56 B1,2,5CD-3,-9,-2743The 35th term of the sequence 6,16,26 is ( ) A123 B335 C245 D34644If 4x+6,9x-3,15x+2 are the successive terms
5、of an arithmetic progression, the value of x is ( ) A1B0C14D-1445How many terms are there in the sequence 11,15,19,131 ? ( ) A32B31C10D1246The sum of the first 14 terms of the series 7+12+17 is ( )A551B553C554D55247The first term of a geometric progression is 6 and the common ratio is The second ter
6、m of the progression is ( ) A6B5C1D948The 8th term of a geometric progression with a common ratio of 3 is 45927What is the first term of the progression? ( ) A22B21C23D2549If 8,x,18 are three terms of a geometric progression, what is the value of x? ( ) A12B21CD-1250What is the sum of the first 5 terms of the sequence 1,3,9,27,? ( ) A121B40C81D121银川一中2020/2021学年度(上)高二期末考试数 学 试 卷 答 题 卡姓名_ 学号_ 得分_题号12345678910答案题号11121314151617181920答案题号21222324252627282930答案题号31323334353637383940答案题号41424344454647484950答案