2015经济类联考数学模拟一（26-30）
26.http://file.koolearn.com/2014/0118/20140118125500685.gif
的根是( )
A.
http://file.koolearn.com/2014/0118/20140118125500516.gif
或
http://file.koolearn.com/2014/0118/20140118125501571.gif
B.
http://file.koolearn.com/2014/0118/20140118125501597.gif
或
http://file.koolearn.com/2014/0118/20140118125502593.gif
C.
http://file.koolearn.com/2014/0118/20140118125502308.gif
或
http://file.koolearn.com/2014/0118/20140118125506592.gif
D.
http://file.koolearn.com/2014/0118/20140118125509278.gif
或
http://file.koolearn.com/2014/0118/20140118125510421.gif
E.以上结果都不正确
27.已知实数
http://file.koolearn.com/2014/0118/20140118125519999.gif
满足
http://file.koolearn.com/2014/0118/20140118125520392.gif
和
http://file.koolearn.com/2014/0118/20140118125522419.gif
，则
http://file.koolearn.com/2014/0118/20140118125523774.gif
( )
A.25 B.26 C.27 D.28 E.29
28.设
http://file.koolearn.com/2014/0118/20140118125523190.gif
，其中
http://file.koolearn.com/2014/0118/20140118125524590.gif
，则对于满足
http://file.koolearn.com/2014/0118/20140118125524912.gif
的
http://file.koolearn.com/2014/0118/20140118125525378.gif
值，
http://file.koolearn.com/2014/0118/20140118125525652.gif
的最小值是()
A.10 B.15 C.20 D.25 E.30
29.曲线
http://file.koolearn.com/2014/0118/20140118125525558.gif
所围成的图形的面积为( )
A.
http://file.koolearn.com/2014/0118/20140118125526417.gif
B.
http://file.koolearn.com/2014/0118/20140118125526345.gif
C.1 D.2 E.4
30.如果方程
http://file.koolearn.com/2014/0118/20140118125527171.gif
有一个负根，那么
http://file.koolearn.com/2014/0118/20140118125527658.gif
的取值范围是()
A.
http://file.koolearn.com/2014/0118/20140118125528306.gif
B.
http://file.koolearn.com/2014/0118/20140118125528267.gif
C.
http://file.koolearn.com/2014/0118/20140118125528994.gif
D.
http://file.koolearn.com/2014/0118/20140118125529364.gif
E. 以上结果都不正确
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