关于集合的:已知两集合A={x|x=t^2+(a+1)t+b},B={x|x=-t^2-(a-1)t-b},求常数a,b,使A交B={x|-1《x《2}.
已知两集合A={x|x=t^2+(a+1)t+b},B={x|x=-t^2-(a-1)t-b},求常数a,b,使A交B={x|-1《x《2}.