22.1二次函数的图象和性质22.1.1二次函数.................................................................................222.1.2二次函数y=ax²的图象和性质...............................................1822.1.3二次函数y=a（x-h）²+k的图象和性质................................33周周测（二）............................................................................................7722.1.4二次函数y=ax²+bx+c的图象和性质.....................................9822.2二次函数与一元二次方程...........................................................129周周测（三）...........................................................................................14422.3实际问题与二次函数..................................................................161小专题（二）二次函数的实际应用.......................................................211
