— Excuse me, could you tell me ?— Certainly. In half an hour.
A:when the high speed train would arrive
B:when the high speed train will arrive
C:when would the high speed train arrive
D:when will the high speed train arrive
科学兴趣小组模拟上述流程,在实验室中制备氢氧化钠。
(Ⅰ)讨论函数f(x)的单调性;
(Ⅱ)当m=1时,若方程f(x)= 12 x2+ac在区间 1e ,+∞)上有唯一的实数解,求实数a的取值范围;
(Ⅲ)当m>0时,若对于区间1,2上的任意两个实数x1,x2,且x1<x2,都有|f(x1)﹣f(x2)|<x22﹣x12成立,求实数m的最大值.