论文部分内容阅读
由已知条件确定二次函数解析式是中考必考内容.二次函数解析式常见的表达形式有如下三种:(1)一般式y:ax~2+bx+c(a≠0);(2)项点式y=a(x-h)~2+k(a≠0),其中(h、k)是
According to the known conditions, it is necessary to determine the quadratic function analytic formula. The common expression form of quadratic function analytic has the following three kinds: (1) the general formula y: ax ~ 2 + bx + c (a ≠ 0); (2) terms y = a (xh) ~ 2 + k (a ≠ 0), where (h, k) is