（Ⅰ）若a=﹣2，求证：函数f（x）在（1，+∞）上是增函数；
（Ⅱ）求函数f（x）在1，e上的最小值及相应的x值．
废液恰好处理完毕时，溶液的pH为____ 。
A:I called you yesterday. You didn't answer it. B:Oh, sorry. I_ in the bathroom at that time.
