（Ⅰ）讨论函数f（x）的单调性；
（Ⅱ）当f（x）有两个极值点x1，x2（x1＜x2）时，总有x2f（x1）≤λ[f′（x1）﹣a（e 1−x1 +1）]（其中f′（x）为f（x）的导函数），求实数λ的值．
当△=4+4a≤0，即a≤﹣1时，﹣x2+2x+a≤0恒成立，
即函数f（x）是R上的减函数．
当△=4+4a＞0，即a＞﹣1时，设﹣x2+2x+a=0的两根：x1=1﹣ 同类题1 We have been in the school ______ three years ago and Mrs. Lee Has taught us English_______ three years.
We have been in the school ______ three years ago and Mrs. Lee Has taught us English_______ three years.
同学们还记得观察“人的口腔上皮细胞”时的惊喜吗？请你通过回忆，回答下列问题：
