题目

 A recent study suggests that teenagers who switch off the TV and sit down to family meals are less to suffer from eating disorders. A. likely                               B. possible C. probable                         D. sure 答案：A(本题满分12分)  已知a∈R，函数f(x)＝4x3－2ax＋a. （1）求f(x)的单调区间； （2）证明：当0≤x≤1时，f(x)＋|2－a|>0.