3D之家预测

2020年中考数学加油,专题复习161:反比例函数有关的综合解答题

2020-02-09 投稿人 : sygthx.com 围观 : 1259 次

DIANXINGSHILIFENXI1:

3D之家预测RUTUSUOSHI,ZAIPINGXINGSIBIANXINGABCDZHONG,DIANa、bHEcDEZUOBIAOFENBIEWEI(1,0)、(3,1)、(3,3),SHUANGQUXIANy=k/x(k≠0,x > 0)TONGGUODIANd.

(1)ZHAODAOSHUANGQUXIANDEJIEXIBIAODASHI;

(2)SHIZHIXIANZAIDIANEYUYZHOUXIANGJIAO,LIANJIEWEIFEN,BINGQIUCHU△CDEDEMIANJI。

CESHIDIANFENXI:

FANBILIHANSHUHEZHUHANSHUDEJIAOJI;PINGXINGSIBIANXINGDEBENZHI。

ZHUTICIGANFENXI:

(1)GENJUPINGXINGSIBIANXINGABCDZHONGDIANa、bHEcDEZUOBIAOWEI(1,0)、(3,1)、(3,3),KEYIDEDAODIANdDEZUOBIAO,YOUYUSHUANGQUXIANy=k/x(k≠0,x > 0)CHUANGUODIANd,KEYIDEDAOkDEZHI,CONGERKEYIDEDAOSHUANGQUXIANDEJIEXIBIAODASHI。

(2)CONGTUZHONGKEYIKANCHU,SANJIAOXINGCDEDEMIANJIDENGYUSANJIAOXINGEDAHESANJIAOXINGMOSHUZHUANHUANQIDEMIANJIZHIHE,CONGERKEYIJIEJUEZHEIGEWENTI。

?DIANXINGSHILIFENXI2:

ZAIPINGMIANZHIJIAOZUOBIAOXIZHONG,SHUANGQUXIAN:y=k/x (x > 0)YUZHIXIANOA: y=xHEZHIXIANab: y=x10XIANGJIAOYULIANGDIANcHEd,OC=3BD。

(1 1)DEDAOSHUANGQUXIANDEJIEXIBIAODASHI;

3D之家预测(2)LIANJIEGUANGPAN,ZHAOCHUSIBIANXINGOCDBDEMIANJI。

CESHIDIANFENXI:

3D之家预测FANBILIHANSHUHEZHUHANSHUDEJIAOJI。

ZHUTICIGANFENXI:

3D之家预测(1)JIAOCHADIANA、CHEDCHUIZHIYUXZHOU,CHUIZHIYINGCHIFENBIEWEIMI、YING、FA。CONGZHIXIANy=xHEy=x 10KEYIKANCHU≈AOB=≈ABO=45。ZHENGMING△CEO∽△DEB,CONGERZHIDAOCE/DF=OC/BD=3,RANHOUSHEZHId (10-m,m),QIZHONGm > 0,CONGERZHIDAOcDEZUOBIAOWEI(3m,3m)。YONGcHEdLIECHUFANBILIHANSHUTUXIANGSHANGDEFANGCHENG,RANHOUKEYIDEDAOmDEZHI。

(2)FENBIEQIUCHU△OCE、△DFB△HETIXINGCDFEDEMIANJI,DEDAODAAN。