2015经济类联考数学模拟一（21-25）
21.若http://file.koolearn.com/2014/0118/20140118125440134.gif
，则
http://file.koolearn.com/2014/0118/20140118125440623.gif
的值是()
A.0 B.280 C.100 D.-100 E.以上结果都不正确
22.已知
http://file.koolearn.com/2014/0118/20140118125441386.gif
，
http://file.koolearn.com/2014/0118/20140118125441779.gif
，
http://file.koolearn.com/2014/0118/20140118125442791.gif
，则
http://file.koolearn.com/2014/0118/20140118125442467.gif
( )
A.2 B.-2 C.12 D.-12 E.以上结果都不正确
23.已知
http://file.koolearn.com/2014/0118/20140118125442187.gif
，则
http://file.koolearn.com/2014/0118/20140118125443762.gif
( )
A.
http://file.koolearn.com/2014/0118/20140118125443644.gif
B.10 C.3 D.2
http://file.koolearn.com/2014/0118/20140118125444873.gif
+2 E.以上结果都不正确
24.已知
http://file.koolearn.com/2014/0118/20140118125444389.gif
，则实数
http://file.koolearn.com/2014/0118/20140118125445722.gif
的取值范围是( )
A.
http://file.koolearn.com/2014/0118/20140118125445690.gif
或
http://file.koolearn.com/2014/0118/20140118125445846.gif
B.
http://file.koolearn.com/2014/0118/20140118125446268.gif
C.
http://file.koolearn.com/2014/0118/20140118125446802.gif
D.
http://file.koolearn.com/2014/0118/20140118125447633.gif
E.以上结果都不正确
25.设
http://file.koolearn.com/2014/0118/20140118125447286.gif
为整数，且
http://file.koolearn.com/2014/0118/20140118125447777.gif
，则
http://file.koolearn.com/2014/0118/20140118125448242.gif
( )
A.2 B.3 C.4 D.-3 E.-2
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