1)已知函数y=2(x+1)^2+1,当x

问题描述:

1)已知函数y=2(x+1)^2+1,当x

1:-1 ,-1
2:1/4 ,1/4 ,1/4
3:-b/2a -b/2a -b/2a 小
4:-b/2a -b/2a -b/2a 大