10．已知存在实数满足  ，则实数的取值范围为                .学科网

9．设直线： 的倾斜角为，直线： 的倾斜角为，且  ，则的值为            .学科网

8．已知圆经过椭圆  的一个顶点和一个焦点，则此椭圆的离心率=               .学科网

7．设等差数列的前项和为，若 ，则的值为         .学科网

6．函数的最小正周期是                    ．学科网

5．已知函数，则              .学科网

4．若方程的解为，则满足的最大整数                  ．学科网

3．已知，其中，则       ．学科网

2．已知命题：“，”，请写出命题的否定:               ．                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               学科网

1．若复数满足（i是虚数单位），则=__________．学科网