2019年高考数学填空题专项训练题库100题(含答案)

2019年高考数学填空题专项训练题库100

题(含答案)

1.设集合A?{x}||x|?4},B?{x|x2?4x?3?0},则集合{x|x?A且

x?A?B}?__________;

2.设p(x)?ax2?2x?1,若对任意实数x,p(x)?0恒成立,则实数a的取值范围是________________;

3.已知2a?3b?m,且??2,则实数m的值为______________; 4.若a?0,a?,则log2a?____________;

3231a1b495.已知二次函数f(x)?ax2?bx?3(a?0),满足f(2)?f(4),则f(6)?________; 6.已知y?f(x)是定义在R上的奇函数,当x?(0,??)时,f(x)?2x?2, 则方程f(x)?0的解集是____________________;

7.已知f(x)?lg?(x2?8x?7)在(m,m?1)上是增函数,则m的取值范围是________________;

8.已知函数f(x)?sinx?5x,x?(?1,1),如果f(1?a)?f(1?a2)?0,则a的取值范围是____________; 9.关于x的方程5x?a?3有负数解,则实数a的取值范围是______________; 5?a10.已知函数f(x)满足:对任意实数x1,x2,当x1`?x2时,有f(x1)?f(x2),且

f(x1?x2)?f(x1)?f(x2).

写出满足上述条件的一个函数:f(x)?_____________;

(1),则11.定义在区间(?1,1)内的函数f(x)满足2f(x)?f(?x)?lgx?f(x)?______________;

x2?2x?212.函数f(x)?(x??1)的图像的最低点的坐标是______________;

x?113.已知正数a,b满足a?b?1,则ab?2的最小值是___________; ab14.设实数a,b,x,y满足a2?b2?1,x2?y2?3,则ax?by的取值范围为______________;

15.不等式(x?2)x2?2x?3?0的解集是_________________; 16.不等式x2?|x|?6?0(x?R)的解集是___________________; 17.已知f(x)??18.若不等式

?1,x?0 ,则不等式xf(x)?x?2的解集是_________________;

??1,x?0xx?2?a?在x?(0,2]上恒成立,则a的取值范围是___________; 22x?9xb19.若a?1,0?b?1,且alog(2x?1)?1,则实数x的取值范围是______________; 20.实系数一元二次方程x2?ax?2b?0的两根分别在区间(0,1)和(1,2)上,

则2a?3b的取值范围是_____________;

21.若函数f(x)?2cos??x????m图像的一条对称轴为直线x?数m的值等于____;

?22.函数y?sin???2x?的单调递增区间是_______________________;

?4?2??1???23.已知tan(???)?,tan?,则???tan???????__________;

5?8??,且f?????1,则实

?8???4?4?4?24.已知sin?2?????,????45sin??cos?3???___________; ,2??,则

sin??cos?2??25.函数y?3sin?x?200??5cos?x?100?的最大值是____________; 26.若

cos2?2,则cos??sin?的值为___________; ????2?sin????4??153527.若cos??????,cos??????,则tan??tan??___________;

28.如果|x|??4,那么函数f(x)?cos2x?sinx的最小值是___________;

??4?29.函数f(x)?sin2x?22cos???x??3的最小值是___________;

?????30.已知向量a?(1,sin?),b?(1,cos?),则|a?b|的最大值为_________; ????????31.若非零向量a与b满足|a?b|?|a?b|,则a与b的夹角大小为_________; ??????32.已知向量a?(n,1),b?(n,?1),若2a?b与b垂直,则|a|?_________;

33.在△ABC中,角A,B,C所对的边分别为a,b,c,

若a?1,B??4,△ABC的面积S?2,那么△ABC的外接圆直径为__________;

1?__________; z234.复数z1?3?i,z2?1?i,则z1?35.若复数

a?3i(a?R,i为虚数单位)是纯虚数,则实数a的值为_________; 1?2i36.若z?C,且|z?2?2i|?1,则|z?2?2i|的最小值是__________;

37.等差数列?an?的前n项之和为Sn,若a17?10?a3,则S19的值为_________; 38.已知数列?an?中,a1??60,an?1?an?3,那么|a1|?|a2|???|a30|的值为_________; 39.首项为?24的等差数列,从第10项起为正数,则公差d的取值范围是_________; 40.已知一个等差数列的前五项之和是120,后五项之和是180,又各项之和是360,则此数列共有______项;

40.已知数列?an?的通项公式为an?n?5,从?an?中依次取出第3,9,27,…,3n,…项,

按原来的顺序排成一个新的数列,则此数列的前n项和为______________; 41.在正项等比数列?an?中,a1,a99是方程x2?10x?16?0的两个根,则a40?a50?a60的值为_______;

42.数列?an?中,a1?2,a2?1,?2an1an?1?1(n?2),则其通项公式为an?__________; an?143.如果直线l与直线x?y?1?0关于y轴对称,那么直线l的方程是

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