I don't really r like the write, I have to say his books are very exciting.
A:although
B:unless
C:until
D:as if
法国大革命的实质是( )
我有一个好朋友,它圆圆的身子,亮晶晶的脸,三只小胳膊,整天“滴答滴答”地转个不停,非常惹人喜爱。晚上睡觉时,它“滴答滴答”地跟我说悄悄话;早上,我睡得正香,它“滴答滴答”地把我唤醒,催我上学。你说,我的好朋友是谁?
已知函数f(x)=alnx(a>0),e为自然对数的底数.
(Ⅰ)过点A(2,f(2))的切线斜率为2,求实数a的值;
(Ⅱ)当x>0时,求证:f(x)≥a(1﹣1x);
(Ⅲ)在区间(1,e)上exa﹣ee1a•x<0恒成立,求实数a的取值范围.