圆梦教育2017届港澳台侨九月月考
数学
一、选择题：本大题共12小题；每小题5分，共60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。请将答案填在题后括号内。
1、设集合U??1,2,3,4,5?,A??1,2,3?,B??2,5?，则A??U·······················（ ） C·B??
A、?2? B、?2,3?C、?3? D、?1,3?
2、下列四个图形中，不．是．以
是··································· ( )
A B CD
3、“x?1”是“x2?x”的····························································（）
A．充分而不必要条件B．必要而不充分条件
C．充分必要条件D．既不充分也不必要条件
4、已知函数x为自变量的函数的图象 f(x)＝x2＋1，那么f(a＋1)的值为··········································· ( )
A．a＋a＋2 2B．a＋12 C．a＋2a＋22D．a＋2a＋1 2
5、已知函数f(x)在上是奇函数，且f(3) ＜f(1),则 ······························( )
（A）f(-1) ＜f(-3)（B）f(0) ＞f(1)（C）f(-1) ＜f(1) （D）f(-3) ＞f(-5)
6、下列等式成立的是 ··································································( )
A．log2(8－4)＝log2 8－log2 4
C．log2 2＝3log2 2
7、幂函3 B．log288＝log2 4log24数D．log2(8＋4)＝log2 8＋log2 4 ＝yxα(α是常数)的图象 ························································( )
A一定经过点(0，0)B一定经过点(1，1)C一定经过点(－1，1)D一定经过点(1，－1)
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