Question

设0＜x＜y＜a＜1,则有(    )

A.log_a(xy)＜0                              B.0＜log_a(xy)＜1

C.1＜log_a(xy)＜2                         D.log_a(xy)＞2

Answer 1

解析:取a=,y=,x=,

∴log_axy=log·=log=5,

因此,可排除A、B、C,故选择D.

答案:D