A: Hi, Jenny!____ my birthday party on Saturday afternoon?
B: Sure,____.
A:____you, Linda?
C: I'm sorry I can't. I ____ study for a test on weekends.
A: That's too bad. Maybe next time.
C: Sure. Thanks for your ____.
设二次函数f(x)=ax2+bx+c(a,b∈R)满足条件:①当x∈R时,f(x)的最大值为0,且f(x﹣1)=f(3﹣x)成立;②二次函数f(x)的图象与直线y=﹣2交于A、B两点,且|AB|=4
(Ⅰ)求f(x)的解析式;
(Ⅱ)求最小的实数n(n<﹣1),使得存在实数t,只要当x∈n,﹣1时,就有f(x+t)≥2x成立.
实验是化学灵魂,是学好化学的重要环节。