初三二次函数中画二次函数的图像要取多少个点
我是说列表时要取多少个点,最少几个点为好?
人气:335 ℃ 时间:2020-01-31 09:40:20
解答
一般用五点画函数图像
找到与Y轴交点
找到二次函数与X轴两交点
找到顶点
在尽量找一点符合函数图像的点,尽量越简单越好
如果在2中只有一个交点或没有交点的话,那么在4中再找一个与对称轴对称的点
希望可以帮到你
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