满分5 > 高中数学试题 >

下列说法错误的是 ( ) A.命题“若”的逆否命题为:“若” B.若是“”的充要...

下列说法错误的是                                                                                                  (    )

       A.命题“若6ec8aac122bd4f6e”的逆否命题为:“若6ec8aac122bd4f6e

       B.若6ec8aac122bd4f6e是“6ec8aac122bd4f6e”的充要条件

       C.若“6ec8aac122bd4f6e” 为假命题,则p、q至少有一个为假命题

       D.命题6ec8aac122bd4f6e,则6ec8aac122bd4f6e

 

B 【解析】略
复制答案
考点分析:
相关试题推荐

已知双曲线6ec8aac122bd4f6e的右焦点与抛物线6ec8aac122bd4f6e的焦点重合,则该双曲线的离心率为                         (    )

       A.6ec8aac122bd4f6e                      B.6ec8aac122bd4f6e                 C.6ec8aac122bd4f6e                      D.6ec8aac122bd4f6e

 

查看答案

已知实数x,y满足约束条件6ec8aac122bd4f6e,则6ec8aac122bd4f6e的最小值是               (    )

       A.5                        B.-6                       C.10                      D.-10

 

查看答案

已知6ec8aac122bd4f6e,且6ec8aac122bd4f6e为纯虚数,则a等于                                   (    )

       A.6ec8aac122bd4f6e                   B.6ec8aac122bd4f6e                 C.1                        D.-1

 

查看答案

(本小题满分12分)设向量6ec8aac122bd4f6e,点6ec8aac122bd4f6e为动点,6ec8aac122bd4f6e已知6ec8aac122bd4f6e

(1)求点6ec8aac122bd4f6e的轨迹方程;

(2)设点6ec8aac122bd4f6e的轨迹与6ec8aac122bd4f6e轴负半轴交于点6ec8aac122bd4f6e,过点6ec8aac122bd4f6e的直线交点6ec8aac122bd4f6e的轨迹于6ec8aac122bd4f6e6ec8aac122bd4f6e两点,试推断6ec8aac122bd4f6e的面积是否存在最大值?若存在,求其最大值;若不存在,请说明理由。

 

查看答案

 

 (本小题满分12分)设函数6ec8aac122bd4f6e,其中6ec8aac122bd4f6e,曲线6ec8aac122bd4f6e在点6ec8aac122bd4f6e处的切线方程为6ec8aac122bd4f6e

(1)若6ec8aac122bd4f6e6ec8aac122bd4f6e的极值点,求6ec8aac122bd4f6e的解析式

(2)若过点6ec8aac122bd4f6e可作曲线6ec8aac122bd4f6e的三条不同切线,求6ec8aac122bd4f6e的取值范围。

 

查看答案
试题属性

Copyright @ 2008-2019 满分5 学习网 ManFen5.COM. All Rights Reserved.