中学生网络课堂
初三数学 (苏教版下册)
二次函数综合
本课配套习题挑战模式1/5
单选题
难度系数：
1.
直线l过点A（4，0）和B（0，4）两点，它与二次函数y=ax2的图象在第一象限内交于点P，若
，则二次函数关系式为（ ）
| A:
|
| B:
|
| C:
|
| D:
|
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6aaW5YWI5rGC5Ye655u057q/QULop6PmnpDlvI/vvIw8L3A+
- 提示2：PHA+5Yip55So6Z2i56ev56Gu5a6a54K5UOWdkOagh++8jOS7juiAjOaxguWHuuino+aekOW8jzwvcD4=
- 答案：Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.
如图，已知二次函数y=ax2+bx+c的图象经过A（1，0）、B（5，0）、C（0，5）三点. 过点C的直线y=kx+b与这个二次函数的图象相交于点E（4，m），则△CBE的面积S的值为（ ）.
| A: 5 |
| B: 10 |
| C: 15 |
| D: 20 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2u5LqM5qyh5Ye95pWweT1heDxzdXA+Mjwvc3VwPitieCtj55qE5Zu+6LGh57uP6L+HQe+8iDHvvIww77yJ44CBQu+8iDXvvIww77yJ44CBQ++8iDDvvIw177yJ5LiJ54K577yM5b6X5YiweT1h77yIeC0x77yJ77yIeC0177yJ77yM5oqKQ+eahOWdkOagh+S7o+WFpeWwseiDveaxguWHumHnmoTlgLzvvIzljbPlj6/lvpflh7rkuozmrKHlh73mlbDnmoTop6PmnpDlvI/vvJs8L3A+
- 提示2：PHA+5oqKReeahOWdkOagh+S7o+WFpeaKm+eJqee6v+WNs+WPr+axguWHum3nmoTlgLzvvIzorr7nm7Tnur9FQ+eahOino+aekOW8j+aYr3k9a3grYu+8jOaKikXjgIFD55qE5Z2Q5qCH5Luj5YWl5bCx6IO95rGC5Ye655u057q/RUPvvIzmsYLnm7Tnur9FQ+S4jljovbTnmoTkuqTngrnlnZDmoIfvvIzov4dF5L2cRU7iiqVY6L205LqOTu+8jOagueaNrueCueeahOWdkOagh+axguWHuuKWs0NCTeWSjOKWs0JNReeahOmdouenr++8jOebuOWKoOWNs+WPr+W+l+WIsOetlOahiDwvcD4=
- 答案：Qg==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.
二次函数y=-x2+2x+3的图象与x轴交于A、B两点，P为它的顶点，则S△PAB=( ).
| A: 4 |
| B: 6 |
| C: 8 |
| D: 10 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2u5Ye95pWw6Kej5p6Q5byP5rGC5Ye6QSxCLFDkuInngrnlnZDmoIfvvIzku47ogIznoa7lrprpnaLnp688L3A+
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
如图，二次函数y=x2+bx+c的图象与x轴只有一个公共点P，与y轴的交点为Q. 过点Q的直线y=2x+m与x轴交于点A，与这个二次函数的图象交于另一点B，若S△BPQ=3S△APQ，则这个二次函数的解析式为（ ）.
| A: y=x2-4x+4 |
| B: y=x2-4x+5 |
| C: y=x2-6x+4 |
| D: y=x2-7x+9 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx5Zu+5b2i5b6XYjxzdXA+Mjwvc3VwPi00YWM9MO+8jGE9Me+8jOino+W+lzxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMS9CQy9yQkFDRTFNSy1jV1RqNTJfQUFBQjBDTkpXZG81MDAucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIxL0JDL3JCQUNFMU1LLWNXVGo1Ml9BQUFCMENOSldkbzUwMC5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSI0OCI+77yMUeS4unnovbTlhazlhbHngrnvvIzlvpdjPW08L3A+
- 提示2：PHA+55SxUzxzdWI+4pazQlBRPC9zdWI+PTNTPHN1Yj7ilrNBUVA8L3N1Yj7lvpdTPHN1Yj7ilrNBQlA8L3N1Yj49NFM8c3ViPuKWs0FRUDwvc3ViPu+8jOW+l+WIsOWFs+S6jmLnmoTmlrnnqIvvvIzmsYLlh7rop6PmnpDlvI88L3A+
- 答案：QQ==
PGRpdj48ZGl2Puino++8muKIteS6jOasoeWHveaVsOeahOWbvuixoeS4jnjovbTlj6rmnInkuIDkuKrlhazlhbHngrlQ77yM4oi054K5UOeahOWdkOagh+S4ujxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wNS9DMS9yQkFDRkZNUDhRUHlWZHJHQUFBQ04xLUFFMlk5MjYucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzA1L0MxL3JCQUNGRk1QOFFQeVZkckdBQUFDTjEtQUUyWTkyNi5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSIxMDAiPu+8jOagueaNruWbvuW9ouWPr+W+l2LvvJww77yM5Y2z5Y+v5b6X5YiwYjxzdXA+Mjwvc3VwPi00YWM9MO+8jOKItWE9Me+8jOKItGI8c3VwPjI8L3N1cD4tNGM9MO+8jOino+W+lzxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yOC9COC9yQkFDRTFNUDhRUHp2Uk0yQUFBQjBFODM0M3c1MDUucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzI4L0I4L3JCQUNFMU1QOFFQenZSTTJBQUFCMEU4MzQzdzUwNS5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSI0OCI+PC9kaXY+PGRpdj7iiLXkuozmrKHlh73mlbDkuI556L2055qE5Lqk54K55Li6UeKItOeCuVHnmoTlnZDmoIfkuLrvvIgw77yMY++8ie+8jOKItVHlnKh5PTJ4K23kuIrvvIw8L2Rpdj48ZGl2PuKItG09YzwvZGl2PjxkaXY+4oi05LiA5qyh5Ye95pWw6Kej5p6Q5byP5Li6eT0yeCtjLDwvZGl2PjxkaXY+ee+8nTJ4K2M8L2Rpdj48ZGl2PnnvvJ14PHN1cD4yPC9zdXA+K2J4K2PiiLRCPGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzA1L0MxL3JCQUNGRk1QOFFPUUdPTjlBQUFDMmoybEZxUTAzNy5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDUvQzEvckJBQ0ZGTVA4UU9RR09OOUFBQUMyajJsRnFRMDM3LnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjE0NCI+PC9kaXY+PGRpdj7iiLVT4pazQlBRPTNT4pazQVFQPC9kaXY+PGRpdj7iiLRT4pazQUJQPTRT4pazQVFQPC9kaXY+PGRpdj7iiLTngrlC55qE57q15Z2Q5qCH5LiOUeeahOe6teWdkOagh+eahOavlOS4ujTvvJox77yMPC9kaXY+PGRpdj7pgqPkuYg8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjgvQjgvckJBQ0UxTVA4UU9URnRCR0FBQUMtSEdHZ2ZJMzg0LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yOC9COC9yQkFDRTFNUDhRT1RGdEJHQUFBQy1IR0dnZkkzODQucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMTM0Ij7vvIw8L2Rpdj48ZGl2Puino+W+l2I9LTTmiJY8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDUvQzEvckJBQ0ZGTVA4UVBTc2hvN0FBQUJsMDUxbzJFMTM4LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wNS9DMS9yQkFDRkZNUDhRUFNzaG83QUFBQmwwNTFvMkUxMzgucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMzYiPu+8iOiIjeWOu++8iS48L2Rpdj48ZGl2PuW9k2I9LTTml7bvvIxjPTTvvIziiLTkuozmrKHlh73mlbDkuLp5PXg8c3VwPjI8L3N1cD4tNHgrNC48YnI+PC9kaXY+PC9kaXY+
本课配套习题挑战模式5/5
单选题
难度系数：
5.
如图，二次函数
的图象与x轴交于B、C两点（点B在点C的左侧），一次函数
的图象经过点B和二次函数图象上另一点A，点A的坐标（4，3），
. 若点P在第四象限内的抛物线上，当△ABP面积S取最大值时此时点P的坐标为（ ）
的图象与x轴交于B、C两点（点B在点C的左侧），一次函数的图象经过点B和二次函数图象上另一点A，点A的坐标（4，3），. 若点P在第四象限内的抛物线上，当△ABP面积S取最大值时此时点P的坐标为（ ）| A: （1，-4） |
| B: （1，-3） |
| C: （2，-3） |
| D: （1，3） |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6KGo56S65Ye6QSxCLFDnmoTngrnlnZDmoIfvvIzov4dQ5YGaeei9tOW5s+ihjOe6v++8jOWIqeeUqOWJsuihpeazleihqOekuumdouenr+ehruWumuacgOWAvDwvcD4=
- 提示2：PHA+5Lmf5Y+v5Lul6L+H54K5UOS9nEFC55qE5bmz6KGM57q/55qE5pa55rOV6K+V5LiA6K+V77yM55u057q/5LiO5oqb54mp57q/55u45YiH5pe25Y+W5pyA5aSn5YC8PGltZyBoZWlnaHQ9IjQyIiB3aWR0aD0iMTMiIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjYvQjkvckJBQ0UxTU9zY0x3LW96WkFBQUJRbTQyMmhRNDc5LnBuZyIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yNi9COS9yQkFDRTFNT3NjTHctb3paQUFBQlFtNDIyaFE0NzkucG5nIj48L3A+
- 答案：Qg==
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
