2018年秋九年级数学上册第二十二章二次函数22.1二次函数的图象和性质22.1.3二次函数y=a(x_h)2的图象和性质(第2课时)预习学案(新版)新人教版.doc

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2018年秋九年级数学上册第二十二章二次函数22.1二次函数的图象和性质22.1.3二次函数y=a(x_h)2的图象和性质(第2课时)预习学案(新版)新人教版.doc_第1页
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2018年秋九年级数学上册第二十二章二次函数22.1二次函数的图象和性质22.1.3二次函数y=a(x_h)2的图象和性质(第2课时)预习学案(新版)新人教版.doc_第2页
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2018年秋九年级数学上册第二十二章二次函数22.1二次函数的图象和性质22.1.3二次函数y=a(x_h)2的图象和性质(第2课时)预习学案(新版)新人教版.doc_第3页
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122.1.3 二次函数 y=a(x-h)的图象和 性质第 2 课时一、预习目标及范围:1.会画二次函数 y=a(x-h)2的图象.2.掌握二次函数 y=a(x-h)2的性质.3.比较函数 y=ax2 与 y=a(x-h) 2的联系.4.预习范围:3335 页,并完成课后练习二、预习要点1.抛物线 y=(x-1)2的开口 ,对称轴是 ,顶点是 ,它可以看做是由 抛物线 y=x2向 平移 个单位长度得到的 .2.与函数 y=2(x-2)2形状相同的抛物线的解析式是 ( )A.y=1+ B.y=(2x+1) 2 C.y=(x-2)2 D.y=2x2122三、预习检测1、若将抛物线 y=-2(x-2) 2的图象的顶点移到原点,则下列平移方法正确的是( )A、 向上平移 2 个单位 B、向下平移 2 个单位C、向左 平移 2 个单位 D、向右平移 2 个单位2、抛物线 y=4(x-3) 2的开口方向 ,对称轴是 ,顶点坐 标是 ,抛物线是最 点,当 x= 时,y 有最 值,其值为 。抛物线与 x 轴交点坐标 ,与 y 轴交点坐标 。2我的疑惑在预习过程中的存在哪些困惑与建议填写在下面,并 与同学交流。_3参考答案预习要点1.向上 直线 x=1 (1,0) 右 12.D预习检测:1.C;2.向上,直线 x=3, (3,0) ,低,3,小,0, (3,0) , (,0,36) ,

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