A:元旦
B:***的生日
C:中国国庆节
D:中国教师节
一个药水瓶的容积是100____
函数f(x)=log2(ax2﹣x﹣2a)在区间(﹣∞,﹣1)上是单调减函数,则实数a的取值范围是____.
He is not strong. He should .
June ____ (twelve) is his birthday.
(Ⅰ)求f(x)的最小正周期、零点;
(Ⅱ)求f(x)在区间 π24,3π4 上的最大值和最小值.