黑龙江省哈尔滨市第六十九中学2018届九年级下学期中考模拟二数学试题图片版1

.............1分Р 取最大值的最大值为21...................................1分Р?答:最多可购买18个该品牌台灯.............................1分Р26.(1)连接AE OD过圆心 AC是弦.................1分Р Р.....................1分.....................1分Р(2) ..............1分Р Р.............................................1分Р .................1分Р(3)过点B作于M交AF的延长线于N ,Р .....................1分Р .....................1分Р 设Р解得(舍).....................1分.....................1分Р27.解:(1)由BC的解析式..........................1分Р 解得..........................1分Р(2)作轴交于K..........................1分Р ..........................1分Р ..........................1分[来源:Z。xx。]Р,, Р Р连接PE 点P的横坐标为tР........................1分Р ,,Р..........................1分Р,, ..................1分[来源:学科网]Р Р的解析式为..........................1分Р联立解得РP点坐标为(4,3)..............................1分