题目

They decided to p their trip until next spring, becauseMatt's leg was broken. 答案：【1】postpone已知二次函数y=ax2+bx+c的图象过点A（-1，0）和C（0，1）（1）若此抛物线对称轴是直线x=12，则抛物线上关于点C的对称点的坐标是 ．（2）若抛物线的顶点在第一象限，设t=a+b+c，则t的取值范围为是 ．