(完整版)(一次函数单元测试题含答案),推荐文档.pdf
第 1 页,共 16 页一次函数单元测试题(分数 120 分时间:120 分钟)一、选择题(本大题共10 小题,共 30 分)1.一次函数?=(?+2)?+?2-4的图象经过原点,则k 的值为()A.2B.-2C.2 或-2D.32.已知一次函数?=?+?-?的图象与x 轴的正半轴相交,且函数值y随自变量x的增大而增大,则k,b 的取值情况为()A.?1,?1,?0C.?0,?0D.?0,?03.若直线?=?+?经过第一、二、四象限,则直线?=?+?的图象大致是()A.B.C.D.4.已知直线?=(?-3)?-3?+1不经过第一象限,则m的取值范围是()A.?13B.?13C.13?3D.13?35.下列函数关系式中:?=2?+1;?=1?;?=?+12-?;?=60?;?=100-25?,表示一次函数的有()A.1 个B.2 个C.3 个D.4 个6.如图,直线?=23?+4与 x 轴、y 轴分别交于点A和点 B,点 C、D 分别为线段AB、OB 的中点,点P 为OA 上一动点,当?+?最小时,点P 的坐标为()A.(-3,0)B.(-6,0)C.(-32,0)D.(-52,0)7.如图是甲、乙两车在某时段速度随时间变化的图象,下列结论错误的是()A.乙前 4 秒行驶的路程为48 米B.在 0到 8 秒内甲的速度每秒增加4 米/秒C.两车到第3 秒时行驶的路程相等D.在 4至 8 秒内甲的速度都大于乙的速度8.如图,?是等腰直角三角形,?=90,?=4,点 P 是?边上一动点,沿?的路径移动,过点P 作?于点D,设?=?,?的面积为y,则下列能大致反映y 与 x 函数关系的图象是()A.B.C.D.第 2 页,共 16 页9.小明、小华从学校出发到青少年宫参加书法比赛,小明步行一段时间后,小华骑自行车沿相同路线行进,两人均匀速前行.他们的路程差?(米)与小明出发时间?(分)之间的函数关系如图所示.下列说法:小华先到达青少年宫;小华的速度是小明速度的2.5倍;?=24;?=480.其中正确的是()A.B.C.D.10.已知一次函数?=?+4与?=?-2的图象在x 轴上相交于同一点,则?的值是()A.4B.-2C.12D.-12二、填空题(本大题共10 小题,共 30 分)11.函数?=1?+2-3-?中自变量 x 的取值范围是_12.如果直线?=-2?+?与两坐标轴所围成的三角形面积是9,则 b 的值为 _ 13.已知?-2与 x成正比例,当?=1时,?=5,那么 y与 x的函数关系式是_ 14.正方形?1?1?1?,?2?2?2?1,?3?3?3?2按如图所示放置,点?1、?2、?3 在直线?=?+1上,点?1、?2、?3 在 x 轴上,则?的坐标是?15.已知一次函数?=(-3?+1)?+?的图象经过一、二、三象限,不经过第四象限,则 a 的取值范围是 _ 16.经过点(2,0)且与坐标轴围成的三角形面积为2 的直线解析式是_ 17.如图,在平面直角坐标系中,直线?=-52?+25与x轴,y轴分别交于点A,B,将?沿过点 A的直线折叠,使点B 落在 x 轴的负半轴上,记作点C,折痕与 y 轴交于点 D,则点 D 的坐标为 _。18.如图,点A 的坐标为(-2,0),点 B 在直线?=-12?+2上运动,当线段AB最短时,点B 的坐标是_19.甲、乙两人骑自行车匀速同向行驶,乙在甲前面100米处,同时出发去距离甲1300 米的目的地,其中甲的速度比乙的速度快.设甲、乙之间的距离为y 米,乙行驶的时间为x秒,y与 x 之间的关系如图所示.若丙也从甲出发的地方沿相同的方向骑自行车行驶,且与甲文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5第 3 页,共 16 页的速度相同,当甲追上乙后45 秒时,丙也追上乙,则丙比甲晚出发_ 秒.20.点 C 坐标为(2?-1,4?+5),当 k 变化时点C 的位置也随之变化,不论 k 取何值时,所得点 C 都在一条直线上,则这条直线的解析式是_三、解答题(本大题共6 大题,共60 分)21.如图,已知直线PA:?=?+1交 y 轴于 Q,直线 PB:?=-2?+?.若四边形PQOB的面积为56,求 m的值(8 分)22.如图,在直角坐标系中,直线?=?+4与 x 轴正半轴交于一点A,与 y 轴交于点B,已知?的面积为10,求这条直线的解析式(8 分)23.如图,已知一次函数?=-?+1的图象与x 轴,y 轴分别交于点A,B,过点?(-1,0)的直线交y轴于点 D,交线段 AB 于点 E(8 分)()求点 A,B 的坐标;()若?与?的面积相等,求直线 CE 的解析式;若 y 轴上的一点P 满足?=45,求点 P的坐标(直接写出结果即可)24.如图,在平面直角坐标系中,直线?1:?=12?+6分别与 x 轴、y 轴交于点B、C,且与直线?2:?=12?交于点 A(12 分)(1)分别求出点A、B、C 的坐标;(2)若 D是线段 OA 上的点,且?的面积为12,求直线CD 的函数表达式;(3)在(2)的条件下,设 P 是射线 CD 上的点,在平面内是否存在点Q,使以 O、C、P、Q 为顶点的四边形是菱形?若存在,请求出点Q 的坐标;若不存在,请说明理由文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5第 4 页,共 16 页25.已知:如图,已知直线AB 的函数解析式为?=-2?+8,与 x 轴交于点 A,与 y轴交于点 B(12分)(1)求 A、B 两点的坐标;(2)若点?(?,?)为线段 AB 上的一个动点(与 A、B 不重合),作?轴于点 E,?轴于点 F,连接 EF,问:若?的面积为 S,求 S关于 m的函数关系式,并写出m 的取值范围;是否存在点P,使 EF 的值最小?若存在,求出EF 的最小值;若不存在,请说明理由如图,长方形ABCD 中,?=6,?=8,点 P 从 A 出发沿?的路线移动,设点P 移动的路程为x,?的面积为y(12 分)(1)写出 y 与 x 之间的函数关系式,并在坐标系中画出这个函数的图象(2)求当?=4和?=18时的函数值(3)当 x 取何值时,?=20,并说明此时点P 在长方形的哪条边上文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5第 5 页,共 16 页一次函数单元测试题答案和解析【答案】1.A2.A3.D4.D5.D6.C7.C8.B9.A10.D11.-2?312.613.?=3?+214.(2?-1-1,2?-1),15.0?0,12?=12?,122?=121 1,?=12,把?=12代入直线AB 的解析式得:12=-?+1,?=12,设直线 CE 的解析式是:?=?+?,?(-1,0),?(12,12)代入得:-?+?=012?+?=12,解得:?=13,?=13,直线 CE 的解析式为?=13?+13?点的坐标为(0,0),连接 OE,?(12,12),?=45,若?=45,则点 P与点 O 重合,故点?(0,0)文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5第 7 页,共 16 页24.解:(1)直线?1:?=-12?+6,当?=0时,?=6,当?=0时,?=12,?(12,0),?(0,6),解方程组:?=12?=-12?+6得:?=3?=6,?(6,3),答:?(6,3),?(12,0),?(0,6)(2)解:设?(?,12?),?的面积为12,126?=12,解得:?=4,?(4,2),设直线 CD 的函数表达式是?=?+?,把?(0,6),?(4,2)代入得:2=4?+?6=?,解得:?=6?=-1,?=-?+6,答:直线CD 的函数表达式是?=-?+6(3)答:存在点 Q,使以 O、C、P、Q 为顶点的四边形是菱形,点 Q 的坐标是(6,6)或(-3,3)或(3 2,-3 2)25.解:(1)令?=0,则?=8,?(0,8),令?=0,则-2?+8=0,?=4,?(4,0),(2)点?(?,?)为线段 AB 上的一个动点,-2?+8=?,?(4,0),?=4,0?4?=12?=124?=2(-2?+8)=-4?+16,(0?0时,(0,?)在 y轴的正半轴上,直线与y 轴交于正半轴;当?0,解得?1;图象与 x 轴的正半轴相交,图象与 y 轴的负半轴相交,?0,?0?=?+?的图象在一、二、三象限;?0,?0?=?+?的图象在一、三、四象限;?0?=?+?的图象在一、二、四象限;?0,?0?=?+?的图象在二、三、四象限.首先根据线?=?+?经过第一、二、四象限,可得?0,再根据?0判断出直线?=?+?的图象所过象限即可【解答】解:直线?=?+?经过第一、二、四象限,?0,直线?=?+?的图象经过第一、三、四象限,故选 D4.【分析】本题主要考查一次函数图象在坐标平面内的位置与k、b的关系.解答本题注意理解:直线?=?+?所在的位置与k、b的符号有直接的关系.?0时,直线必经过一、三象限;?0时,直线与 y 轴正半轴相交;?=0时,直线过原点;?0时,直线与y轴负半轴相交.根据一次函数?=(?-3)?-3?+1,图象在坐标平面内的位置关系先确定m 的取值范围,从而求解【解答】解:由直线?=(?-3)?-3?+1不经过第一象限,则经过第二、四象限或第二、三、四象限或三、四象限,有-3?+1 0?-3 0,解得:13?3,故选 D5.解:?=2?+1,?=?+12-?,?=60?,?=100-25?,故选:D 形如?=?+?(?0),称为一次函数本题考查一次函数的定义,解题的关键是正确理解一次函数的一般式,本题属于基础题型6.【分析】本题考查了待定系数法求函数解析式、一次函数图象上点的坐标特征以及轴对称中最短路径问题,解题的关键是找出点P 的位置(方法一)根据一次函数解析式求出点A、B 的坐标,再由中点坐标公式求出点C、D 的坐标,根据对称的性质找出点?的坐标,结合点C、?的坐标求出直线?的解析式,令?=0即可求出x 的值,从而得出点P 的坐标(方法二)根据一次函数解析式求出点A、B 的坐标,再由中点坐标公式求出点C、D 的坐标,根据对称的性质找出点?的坐标,根据三角形中位线定理即可得出点P 为线段?的中点,由此即可得出点P 的坐标【解答】解:(方法一)作点 D 关于 x 轴的对称点?,连接?交 x 轴于点 P,此时?+?值最小,如图所示文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5第 10 页,共 16 页令?=23?+4中?=0,则?=4,点 B 的坐标为(0,4);令?=23?+4中?=0,则23?+4=0,解得:?=-6,点 A 的坐标为(-6,0)点 C、D 分别为线段AB、OB 的中点,点?(-3,2),点?(0,2)点?和点 D 关于 x 轴对称,点?的坐标为(0,-2)设直线?的解析式为?=?+?,直线?过点?(-3,2),?(0,-2),有2=-3?+?-2=?,解得:?=-43?=-2,直线?的解析式为?=-43?-2令?=-43?-2中?=0,则 0=-43?-2,解得:?=-32,点 P 的坐标为(-32,0)故选 C(方法二)连接 CD,作点 D 关于 x 轴的对称点?,连接?交 x 轴于点 P,此时?+?值最小,如图所示令?=23?+4中?=0,则?=4,点 B 的坐标为(0,4);令?=23?+4中?=0,则23?+4=0,解得:?=-6,点 A 的坐标为(-6,0)点 C、D 分别为线段AB、OB 的中点,点?(-3,2),点?(0,2),?/?轴,点?和点 D 关于 x 轴对称,点?的坐标为(0,-2),点 O 为线段?的中点又?/?,点 P 为线段?的中点,点 P 的坐标为(-32,0)故选 C文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1 HT2Y6F3E5D2 ZE4O3P7Z6R5文档编码:CC4I2Q6A10G1