反比例函数与几何图形综合题.pdf

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1、精品资料欢迎下载专题跟踪突破 13 反比例函数与几何图形综合题1(导学号:01262176)(2016自贡)如图,已知A(4,n),B(2,4)是一次函数ykx b 和反比例函数ymx的图象的两个交点(1)求一次函数和反比例函数的解析式;(2)观察图象,直接写出方程kxbmx0 的解;(3)求 AOB的面积;(4)观察图象,直接写出不等式kx bmx0 的解集解:(1)B(2,4)在 ymx上,m 8.反比例函数的解析式为y8x.点 A(4,n)在 y8x上,n2.A(4,2)ykx b 经过A(4,2),B(2,4),4kb2,2kb 4,解得k 1,b 2,一次函数的解析式为y x2(2)

2、A(4,n),B(2,4)是一次函数ykxb 的图象和反比例函数ymx的图象的两个交点,方程kxbmx 0的解是 x1 4,x22(3)当 x 0 时,y 2.点 C(0,2)OC 2.SAOB S ACOSBCO122412226(4)不等式 kxbmx0 的解集为 4x0 或 x2 2(导学号:01262177)(2016枣庄)如图,在矩形OABC中,OA 3,OC 2,F 是 AB上的一个动点(F 不与 A,B 重合),过点F 的反比例函数ykx(k 0)的图象与BC边交于点-第 1 页,共 4 页精品p d f 资料 可编辑资料-精品资料欢迎下载E.(1)当 F 为 AB的中点时,求该

3、函数的解析式;(2)当 k 为何值时,EFA的面积最大,最大面积是多少?解:(1)在矩形 OABC 中,OA 3,OC 2,B(3,2),F为 AB的中点,F(3,1),点 F 在反比例函数ykx(k 0)的图象上,k3,该函数的解析式为y3x(x 0)(2)由题意知E,F 两点坐标分别为E(k2,2),F(3,k3),SEFA12AFBE 1213k(3 12k)12k112k2112(k26k99)112(k 3)234,当 k3 时,S有最大值,S最大值343(导学号:01262178)(2016资阳)如图,在平行四边形ABCD中,点A,B,C 的坐标分别是(1,0),(3,1),(3,

4、3),双曲线 ykx(k 0,x0)过点 D.(1)求双曲线的解析式;(2)作直线 AC交 y 轴于点 E,连接 DE,求 CDE的面积解:(1)在平行四边形ABCD中,点 A,B,C的坐标分别是(1,0),(3,1),(3,3),点 D 的坐标是(1,2),双曲线ykx(k 0,x0)过点 D,2k1,解得 k 2,即双曲线的解析式是y2x(2)直线 AC交 y 轴于点 E,SCDESEDA SADC(20)12(20)(31)2123,即 CDE的面积是3-第 2 页,共 4 页精品p d f 资料 可编辑资料-文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V

5、3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK

6、2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V

7、3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK

8、2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V

9、3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK

10、2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V

11、3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3精品资料欢迎下载4(导学号:01262076)(2016东营)如图,在平面直角坐标系中,直线AB 与 x 轴交于点 B,与 y 轴交于点A,与反比例函数ymx的图象在第二象限交于点C,CE x 轴,垂足为点 E,tanABO 12,OB 4,OE 2.(1)求反比例函数的解析式;(2)若点 D是反比例函数图象在第四象限上的点,过点D 作 DFy 轴,垂足为点F,连接 OD,BF.如果 SBAF 4SDFO,求点 D的坐标解:(1)OB

12、 4,OE 2,BE OB OE 6.CE x 轴,CEB 90.在RtBEC中,CEB 90,BE 6,tanABO 12,CE BE tanABO 6123,结合函数图象可知点 C 的坐标为(2,3)点 C 在反比例函数ymx的图象上,m 23 6,反比例函数的解析式为y6x(2)点 D 在反比例函数y6x第四象限的图象上,设点D 的坐标为(n,6n)(n 0)在RtAOB中,AOB 90,OB 4,tanABO 12,OA OB tanABO 412 2.S BAF12AF OB 12(OAOF)OB 12(26n)4412n.点 D 在反比例函数y6x第四象限的图象上,SDFO12|6

13、|3.SBAF4SDFO,412n4 3,解得 n32,经验证n32是分式方程412n 43 的解,点D的坐标为(32,4)5(导学号:01262077)(2016泰州)如图,点 A(m,4),B(4,n)在反比例函数y-第 3 页,共 4 页精品p d f 资料 可编辑资料-文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文

14、档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W

15、4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文

16、档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W

17、4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文

18、档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W

19、4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3精品资料欢迎下载kx(k 0)的图象上,经过点A,B的直线与x 轴相交于点C,与

20、y 轴相交于点D.(1)若 m 2,求 n 的值;(2)求 m n 的值;(3)连接 OA,OB,若tanAOD tan BOC 1,求直线AB的函数关系式解:(1)当 m 2,则 A(2,4),把 A(2,4)代入 ykx得 k248,所以反比例函数解析式为 y8x,把 B(4,n)代入 y8x得,4n8,解得 n 2(2)因为点 A(m,4),B(4,n)在反比例函数ykx(k 0)的图象上,所以4m k,4nk,所以 4m 4n0,即 m n0(3)作 AE y 轴于 E,BF x 轴于 F,如图,在RtAOE中,tanAOE AEOEm4,在RtBOF中,tan BOF BFOFn4,

21、而tanAOD tanBOC 1,所以m4n41,而 m n0,解得 m 2,n 2,则 A(2,4),B(4,2),设直线AB的解析式为ypxq,把 A(2,4),B(4,2)代入得2pq4,4pq 2,解得p1,q2,所以直线 AB的解析式为yx2-第 4 页,共 4 页精品p d f 资料 可编辑资料-文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W

22、3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:

23、CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W

24、3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:

25、CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W

26、3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3文档编码:CC2V2H2Z1S2 HK2W4P2W3O5 ZT1O4I9U3V3

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