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)随堂检测(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)随堂检测(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)随堂检测(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)随堂检测(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1.把抛物线 y=-x2沿着 x 轴方向平移 3 个单位长度,那么平移后抛物线的 解析式是 .2.二次函数 y=2(x- )2图象的对称轴是直线 _ _,顶点是_.33 .若(- , y1) (- , y2) ( , y3)为二次函数 y=(x-2)2图象上的三点,则 y1 4514, y2 , y3的大小关系为_.4. 若抛物线 y=a(x-h)的顶点是(-3,0) ,它是由抛 物线 y=-2x通过平移而得到的,则 a= _, h= _.5.指出下列函数图 象的开口方向,对称轴和顶点坐标.6.在同一坐标系中,画出函数 y2 x2与 y2( x-2)2的图象,分别指出两 个图象之间的相互关系23参考答 案1. y=-(x+3)2或 y=-(x-3)22. ,3(,03. y1 y2 y34.-2 -35.6. 解:图象如图.函数 y=2(x-2)2的图象由函数 y=2x2的 图象向右平移 2 个单位得到.

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