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→?題型突破←→?專題精練←題型一反比例函數(shù)的基本性質(zhì)1.下列函數(shù)中,為反比例函數(shù)的是()A. B. C. D.2.若函數(shù)的圖象經(jīng)過(guò)點(diǎn)A(-1,2),則的值為()A.1 B.-1 C.2 D.-23.下列函數(shù):①y=﹣2x;②y=;③y=x﹣1;④y=5x2+1,是反比例函數(shù)的個(gè)數(shù)有()A.0個(gè) B.1個(gè) C.2個(gè) D.3個(gè)4.下式中表示是的反比例函數(shù)的是()A. B. C. D.5.已知反比例函數(shù)的圖象經(jīng)過(guò)點(diǎn)P(3,2),則下列各點(diǎn)在這個(gè)函數(shù)圖象上的是()A.(-3,-2) B.(3,-2) C.(2,-3) D.(-2,3)6.若函數(shù)是反比例函數(shù),則m的值為()A.m=-2B.m=1C.m=2或m=1D.m=-2或m=-17.若函數(shù)y=(3﹣k)是反比例函數(shù),那么k的值是()A.0 B.3 C.0或3 D.不能確定8.已知點(diǎn)在反比例函數(shù)的圖象上,則的值是()A.50 B.2 C. D.9.下列關(guān)系式中,不是y關(guān)于x的反比例函數(shù)的是()A.xy=2 B.y= C.x= D.x=5y﹣110.若反比例函數(shù)的圖象經(jīng)過(guò)點(diǎn),則的取值范圍是()A. B. C. D.11.已知點(diǎn),都在反比例函數(shù)的圖象上,且,則,的關(guān)系是()A. B. C. D.12.函數(shù)的圖象大致是()A. B. C. D.13.若反比例函數(shù)EMBEDEquation.DSMT4的圖象經(jīng)過(guò)點(diǎn)EMBEDEquation.DSMT4,則該函數(shù)圖象位于()A.第一、二象限 B.第二、四象限 C.第三、四象限 D.第一、三象限14.下列說(shuō)法正確的是()①反比例函數(shù)EMBEDEquation.DSMT4中自變量x的取值范圍是EMBEDEquation.DSMT4;②點(diǎn)EMBEDEquation.DSMT4在反比例函數(shù)EMBEDEquation.DSMT4的圖象上;③反比例函數(shù)EMBEDEquation.DSMT4的圖象,在每一個(gè)象限內(nèi),y隨x的增大而增大.A.①② B.①③ C.②③ D.①②③15.反比例函數(shù)EMBEDEquation.DSMT4的圖象如圖所示,以下結(jié)論:①常數(shù)EMBEDEquation.DSMT4;②若函數(shù)EMBEDEquation.DSMT4的圖象與EMBEDEquation.DSMT4的圖象關(guān)于y軸對(duì)稱,則EMBEDEquation.DSMT4;③若EMBEDEquation.DSMT4,EMBEDEquation.DSMT4在圖象上,則EMBEDEquation.DSMT4;④若EMBEDEquation.DSMT4在圖象上,則EMBEDEquation.DSMT4也在圖象上.其中正確的結(jié)論個(gè)數(shù)有是()A.1 B.2 C.3 D.416.(2023·內(nèi)蒙古通遼·統(tǒng)考中考真題)已知點(diǎn)EMBEDEquation.DSMT4在反比例函數(shù)EMBEDEquation.DSMT4的圖像上,且EMBEDEquation.DSMT4,則下列結(jié)論一定正確的是(

)A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT417.雙曲線EMBEDEquation.DSMT4有三個(gè)點(diǎn)EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,若EMBEDEquation.DSMT4,則EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4的大小關(guān)系是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT418.下列說(shuō)法正確的是()A.函數(shù)EMBEDEquation.DSMT4的圖象是過(guò)原點(diǎn)的射線 B.直線EMBEDEquation.DSMT4經(jīng)過(guò)第一?二?三象限C.函數(shù)EMBEDEquation.DSMT4,y隨x增大而增大 D.函數(shù)EMBEDEquation.DSMT4,y隨x增大而減小19.(2023·湖北宜昌·統(tǒng)考中考真題)某反比例函數(shù)圖象上四個(gè)點(diǎn)的坐標(biāo)分別為EMBEDEquation.DSMT4,則,EMBEDEquation.DSMT4的大小關(guān)系為(

)A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT420.(2023·浙江嘉興·統(tǒng)考中考真題)已知點(diǎn)EMBEDEquation.DSMT4均在反比例函數(shù)EMBEDEquation.DSMT4的圖象上,則EMBEDEquation.DSMT4的大小關(guān)系是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT421.若點(diǎn)EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4在反比例函數(shù)EMBEDEquation.DSMT4的圖象上,則EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4的大小關(guān)系為()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT422.若點(diǎn)EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4都在反比例函數(shù)EMBEDEquation.DSMT4的圖像上,則EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4的大小關(guān)系是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT423.下列各點(diǎn)中,在反比例函數(shù)EMBEDEquation.DSMT4圖象上點(diǎn)的坐標(biāo)是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT424.(2023·云南·統(tǒng)考中考真題)若點(diǎn)EMBEDEquation.DSMT4是反比例函數(shù)EMBEDEquation.DSMT4圖象上一點(diǎn),則常數(shù)EMBEDEquation.DSMT4的值為(

)A.3 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT425.(2023·湖南永州·統(tǒng)考中考真題)已知點(diǎn)EMBEDEquation.DSMT4在反比例函數(shù)EMBEDEquation.DSMT4的圖象上,其中a,k為常數(shù),且EMBEDEquation.DSMT4﹐則點(diǎn)M一定在(

)A.第一象限 B.第二象限 C.第三象限 D.第四象限26.下列各點(diǎn)中,在反比例函數(shù)EMBEDEquation.DSMT4圖象上的是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT427.若點(diǎn)EMBEDEquation.DSMT4都在反比例函數(shù)EMBEDEquation.DSMT4的圖象上,則EMBEDEquation.DSMT4的大小關(guān)系是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT428.下列函數(shù)中,表示EMBEDEquation.DSMT4是EMBEDEquation.DSMT4的反比例函數(shù)的是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT429.已知EMBEDEquation.DSMT4是反比例函數(shù)EMBEDEquation.DSMT4圖象上三點(diǎn),若EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,則下列關(guān)系式不正確的是()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT430.在反比例函數(shù)EMBEDEquation.DSMT4中,當(dāng)x=1時(shí),y的值為()A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.1 D.-131.(2023·天津·統(tǒng)考中考真題)若點(diǎn)EMBEDEquation.DSMT4都在反比例函數(shù)EMBEDEquation.DSMT4的圖象上,則EMBEDEquation.DSMT4的大小關(guān)系是(

)A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT432.(2023·湖北隨州·統(tǒng)考中考真題)已知蓄電池的電壓為定值,使用某蓄電池時(shí),電流I(單位:A)與電阻R(單位:EMBEDEquation.DSMT4)是反比例函數(shù)關(guān)系,它的圖象如圖所示,則當(dāng)電阻為EMBEDEquation.DSMT4時(shí),電流為(

)

A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT433.(2023·山西·統(tǒng)考中考真題)已知EMBEDEquation.DSMT4都在反比例函數(shù)EMBEDEquation.DSMT4的圖象上,則a、b、c的關(guān)系是(

)A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT434.(2023·湖北·統(tǒng)考中考真題)在反比例函數(shù)EMBEDEquation.DSMT4的圖象上有兩點(diǎn)EMBEDEquation.DSMT4,當(dāng)EMBEDEquation.DSMT4時(shí),有EMBEDEquation.DSMT4,則EMBEDEquation.DSMT4的取值范圍是(

)A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT435.(2023·廣東·統(tǒng)考中考真題)某蓄電池的電壓為EMBEDEquation.DSMT4,使用此蓄電池時(shí),電流EMBEDEquation.DSMT4(單位:EMBEDEquation.DSMT4)與電阻EMBEDEquation.DSMT4(單位:EMBEDEquation.DSMT4)的函數(shù)表達(dá)式為EMBEDEquation.DSMT4,當(dāng)EMBEDEquation.DSMT4時(shí),EMBEDEquation.DSMT4的值為_(kāi)______EMBEDEquation.DSMT4.36.(2023·四川成都·統(tǒng)考中考真題)若點(diǎn)EMBEDEquation.DSMT4都在反比例函數(shù)EMBEDEquation.DSMT4的圖象上,則EMBEDEquation.DSMT4_______EMBEDEquation.DSMT4(填“EMBEDEquation.DSMT4”或“EMBEDEquation.DSMT4”).37.(2023·河北·統(tǒng)考中考真題)如圖,已知點(diǎn)EMBEDEquation.DSMT4,反比例函數(shù)EMBEDEquation.DSMT4圖像的一支與線段EMBEDEquation.DSMT4有交點(diǎn),寫出一個(gè)符合條件的k的數(shù)值:_________.

題型二反比例函數(shù)中K的幾何意義38.(2023·湖南·統(tǒng)考中考真題)如圖,平面直角坐標(biāo)系中,O是坐標(biāo)原點(diǎn),點(diǎn)A是反比例函數(shù)EMBEDEquation.DSMT4圖像上的一點(diǎn),過(guò)點(diǎn)A分別作EMBEDEquation.DSMT4軸于點(diǎn)M,EMBEDEquation.DSMT4軸于直N,若四邊形EMBEDEquation.DSMT4的面積為2.則k的值是(

A.2 B.EMBEDEquation.DSMT4 C.1 D.EMBEDEquation.DSMT439.(2023·內(nèi)蒙古·統(tǒng)考中考真題)如圖,在平面直角坐標(biāo)系中,EMBEDEquation.DSMT4三個(gè)頂點(diǎn)的坐標(biāo)分別為EMBEDEquation.DSMT4與EMBEDEquation.DSMT4關(guān)于直線EMBEDEquation.DSMT4對(duì)稱,反比例函數(shù)EMBEDEquation.DSMT4的圖象與EMBEDEquation.DSMT4交于點(diǎn)EMBEDEquation.DSMT4.若EMBEDEquation.DSMT4,則EMBEDEquation.DSMT4的值為(

A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT440.(2023·湖南懷化·統(tǒng)考中考真題)如圖,反比例函數(shù)EMBEDEquation.DSMT4的圖象與過(guò)點(diǎn)EMBEDEquation.DSMT4的直線EMBEDEquation.DSMT4相交于EMBEDEquation.DSMT4、EMBEDEquation.DSMT4兩點(diǎn).已知點(diǎn)EMBEDEquation.DSMT4的坐標(biāo)為EMBEDEquation.DSMT4,點(diǎn)EMBEDEquation.DSMT4為EMBEDEquation.DSMT4軸上任意一點(diǎn).如果EMBEDEquation.DSMT4,那么點(diǎn)EMBEDEquation.DSMT4的坐標(biāo)為(

A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4或EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT4或EMBEDEquation.DSMT441.(2023·湖南·統(tǒng)考中考真題)如圖,矩形EMBEDEquation.DSMT4的頂點(diǎn)EMBEDEquation.DSMT4和正方形EMBEDEquation.DSMT4的頂點(diǎn)EMBEDEquation.DSMT4都在反比例函數(shù)EMBEDEquation.DSMT4的圖像上,點(diǎn)EMBEDEquation.DSMT4的坐標(biāo)為EMBEDEquation.DSMT4,則點(diǎn)EMBEDEquation.DSMT4的坐標(biāo)為(

A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT442.(2023·廣西·統(tǒng)考中考真題)如圖,過(guò)EMBEDEquation.DSMT4的圖象上點(diǎn)A,分別作x軸,y軸的平行線交EMBEDEquation.DSMT4的圖象于B,D兩點(diǎn),以EMBEDEquation.DSMT4,EMBEDEquation.DSMT4為鄰邊的矩形EMBEDEquation.DSMT4被坐標(biāo)軸分割成四個(gè)小矩形,面積分別記為EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,若EMBEDEquation.DSMT4,則EMBEDEquation.DSMT4的值為(

A.4 B.3 C.2 D.143.(2023·福建·統(tǒng)考中考真題)如圖,正方形四個(gè)頂點(diǎn)分別位于兩個(gè)反比例函數(shù)EMBEDEquation.DSMT4和EMBEDEquation.DSMT4的圖象的四個(gè)分支上,則實(shí)數(shù)EMBEDEquation.DSMT4的值為()

A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.344.(2023·湖南張家界·統(tǒng)考中考真題)如圖,矩形EMBEDEquation.DSMT4的頂點(diǎn)A,C分別在y軸、x軸的正半軸上,點(diǎn)D在EMBEDEquation.DSMT4上,且EMBEDEquation.DSMT4,反比例函數(shù)EMBEDEquation.DSMT4的圖象經(jīng)過(guò)點(diǎn)D及矩形EMBEDEquation.DSMT4的對(duì)稱中心M,連接EMBEDEquation.DSMT4.若EMBEDEquation.DSMT4的面積為3,則k的值為(

A.2 B.3 C.4 D.545.(2023·黑龍江·統(tǒng)考中考真題)如圖,EMBEDEquation.DSMT4是等腰三角形,EMBEDEquation.DSMT4過(guò)原點(diǎn)EMBEDEquation.DSMT4,底邊EMBEDEquation.DSMT4軸,雙曲線EMBEDEquation.DSMT4過(guò)EMBEDEquation.DSMT4兩點(diǎn),過(guò)點(diǎn)EMBEDEquation.DSMT4作EMBEDEquation.DSMT4軸交雙曲線于點(diǎn)EMBEDEquation.DSMT4,若EMBEDEquation.DSMT4,則EMBEDEquation.DSMT4的值是(

A.EMBEDEquation.DSMT4 B.EMBEDEquation.DSMT4 C.EMBEDEquation.DSMT4 D.EMBEDEquation.DSMT446.(2023·黑龍江綏化·統(tǒng)考中考真題)在平面直角坐標(biāo)系中,點(diǎn)A在y軸的正半軸上,EMBEDEquation.DSMT4平行于x軸,點(diǎn)B,C的橫坐標(biāo)都是3,EMBEDEquation.DSMT4,點(diǎn)D在EMBEDEquation.DSMT4上,且其橫坐標(biāo)為1,若反比例函數(shù)EMBEDEquation.DSMT4(EMBEDEquation.DSMT4)的圖像經(jīng)過(guò)點(diǎn)B,D,則k的值是(

)A.1 B.2 C.3 D.EMBEDEquation.DSMT447.(2023·黑龍江齊齊哈爾·統(tǒng)考中考真題)如圖,點(diǎn)A在反比例函數(shù)EMBEDEquation.DSMT4圖像的一支上,點(diǎn)B在反比例函數(shù)EMBEDEquation.DSMT4圖像的一支上,點(diǎn)C,D在x軸上,若四邊形EMBEDEquation.DSMT4是面積為9的正方形,則實(shí)數(shù)k的值為_(kāi)_____.

48.(2023·廣東深圳·統(tǒng)考中考真題)如圖,EMBEDEquation.DSMT4與EMBEDEquation.DSMT4位于平面直角坐標(biāo)系中,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,若EMBEDEquation.DSMT4,反比例函數(shù)EMBEDEquation.DSMT4恰好經(jīng)過(guò)點(diǎn)C,則EMBEDEquation.DSMT4______.題型三反比例函數(shù)與一次函數(shù)49.(2023·甘肅蘭州·統(tǒng)考中考真題)如圖,反比例函數(shù)EMBEDEquation.DSMT4與一次函數(shù)EMBEDEquation.DSMT4的圖象交于點(diǎn)EMBEDEquation.DSMT4,EMBEDEquation.DSMT4軸于點(diǎn)D,分別交反比例函數(shù)與一次函數(shù)的圖象于點(diǎn)B,C.

(1)求反比例函數(shù)EMBEDEquation.DSMT4與一次函數(shù)EMBEDEquation.DSMT4的表達(dá)式;(2)當(dāng)EMBEDEquation.DSMT4時(shí),求線段EMBEDEquation.DSMT4的長(zhǎng).50.(2023·浙江杭州·統(tǒng)考中考真題)在直角坐標(biāo)系中,已知EMBEDEquation.DSMT4,設(shè)函數(shù)EMBEDEquation.DSMT4與函數(shù)EMBEDEquation.DSMT4的圖象交于點(diǎn)EMBEDEquation.DSMT4和點(diǎn)EMBEDEquation.DSMT4.已知點(diǎn)EMBEDEquation.DSMT4的橫坐標(biāo)是2,點(diǎn)EMBEDEquation.DSMT4的縱坐標(biāo)是EMBEDEquation.DSMT4.

(1)求EMBEDEquation.DSMT4的值.(2)過(guò)點(diǎn)EMBEDEquation.DSMT4作EMBEDEquation.DSMT4軸的垂線,過(guò)點(diǎn)EMBEDEquation.DSMT4作EMBEDEquation.DSMT4軸的垂線,在第二象限交于點(diǎn)EMBEDEquation.DSMT4;過(guò)點(diǎn)EMBEDEquation.DSMT4作EMBEDEquation.DSMT4軸的垂線,過(guò)點(diǎn)EMBEDEquation.DSMT4作EMBEDEquation.DSMT4軸的垂線,在第四象限交于點(diǎn)EMBEDEquation.DSMT4.求證:直線EMBEDEquation.DSMT4經(jīng)過(guò)原點(diǎn).51.(2023·湖南常德·統(tǒng)考中考真題)如圖所示,一次函數(shù)EMBEDEquation.DSMT4與反比例函數(shù)EMBEDEquation.DSMT4相交于點(diǎn)A和點(diǎn)EMBEDEquation.DSMT4.

(1)求m的值和反比例函數(shù)解析式;(2)當(dāng)EMBEDEquation.DSMT4時(shí),求x的取值范圍.52.(2023·江西·統(tǒng)考中考真題)如圖,已知直線EMBEDEquation.DSMT4與反比例函數(shù)EMBEDEquation.DSMT4的圖象交于點(diǎn)EMBEDEquation.DSMT4,與y軸交于點(diǎn)B,過(guò)點(diǎn)B作x軸的平行線交反比例函數(shù)EMBEDEquation.DSMT4的圖象于點(diǎn)C.

(1)求直線EMBEDEquation.DSMT4和反比例函數(shù)圖象的表達(dá)式;(2)求EMBEDEquation.DSMT4的面積.53.(2023·湖南岳陽(yáng)·統(tǒng)考中考真題)如圖,反比例函數(shù)EMBEDEquation.DSMT4(EMBEDEquation.DSMT4為常數(shù),EMBEDEquation.DSMT4)與正比例函數(shù)EMBEDEquation.DSMT4(EMBEDEquation.DSMT4為常數(shù),EMBEDEquation.DSMT4)的圖像交于EMBEDEquation.DSMT4兩點(diǎn).

(1)求反比例函數(shù)和正比例函數(shù)的表達(dá)式;(2)若y軸上有一點(diǎn)EMBEDEquation.DSMT4的面積為4,求點(diǎn)EMBEDEquation.DSMT4的坐標(biāo).54.(2023·山東濱州·統(tǒng)考中考真題)如圖,直線EMBEDEquation.DSMT4為常數(shù)EMBEDEquation.DSMT4與雙曲線EMBEDEquation.DSMT4(EMBEDEquation.DSMT4為常數(shù))相交于EMBEDEquation.DSMT4,EMBEDEquation.DSMT4兩點(diǎn).

(1)求直線EMBEDEquation.DSMT4的解析式;(2)在雙曲線EMBEDEquation.DSMT4上任取兩點(diǎn)EMBEDEquation.DSMT4和EMBEDEquation.DSMT4,若EMBEDEquation.DSMT4,試確定EMBEDEquation.DSMT4和EMBEDEquation.DSMT4的大小關(guān)系,并寫出判斷過(guò)程;(3)請(qǐng)直接寫出關(guān)于EMBEDEquation.DSMT4的不等式EMBEDEquation.DSMT4的解集.55.(2023·四川樂(lè)山·統(tǒng)考中考真題)如圖,一次函數(shù)EMBEDEquation.DSMT4的圖象與反比例函數(shù)EMBEDEquation.DSMT4的圖象交于點(diǎn)EMBEDEquation.DSMT4,與x軸交于點(diǎn)B,與y軸交于點(diǎn)EMBEDEquation.DSMT4.

(1)求m的值和一次函數(shù)的表達(dá)式;(2)已知P為反比例函數(shù)EMBEDEquation.DSMT4圖象上的一點(diǎn),EMBEDEquation.DSMT4,求點(diǎn)P的坐標(biāo).56.(2023·湖南·統(tǒng)考中考真題)如圖,點(diǎn)A的坐標(biāo)是EMBEDEquation.DSMT4,點(diǎn)B的坐標(biāo)是EMBEDEquation.DSMT4,點(diǎn)C為EMBEDEquation.DSMT4中點(diǎn),將EMBEDEquation.DSMT4繞著點(diǎn)B逆時(shí)針旋轉(zhuǎn)EMBEDEquation.DSMT4得到EMBEDEquation.DSMT4.

(1)反比例函數(shù)EMBEDEquation.DSMT4的圖像經(jīng)過(guò)點(diǎn)EMBEDEquation.DSMT4,求該反比例函數(shù)的表達(dá)式;(2)一次函數(shù)圖像經(jīng)過(guò)A、EMBEDEquation.DSMT4兩點(diǎn),求該一次函數(shù)的表達(dá)式.56.(2023·四川自貢·統(tǒng)考中考真題)如圖,點(diǎn)EMBEDEquation.DSMT4在反比例函數(shù)EMBEDEquation.DSMT4圖象上.一次函數(shù)EMBEDEquation.DSMT4的圖象經(jīng)過(guò)點(diǎn)A,分別交x軸,y軸于點(diǎn)B,C,且EMBEDEquation.DSMT4與EMBEDEquation.DSMT4的面積比為EMBEDEquation.DSMT4.

(1)求反比例函數(shù)和一次函數(shù)的解析式;(2)請(qǐng)直接寫出EMBEDEquation.DSMT4時(shí),x的取值范圍.57.(2023·四川南充·統(tǒng)考中考真題)如圖,一次函數(shù)圖象與反比例函數(shù)圖象交于點(diǎn)EMBEDEquation.DSMT4,EMBEDEquation.DSMT4,與x軸交于點(diǎn)C,與y軸交于點(diǎn)D.(1)求反比例函數(shù)與一次函數(shù)的解析式;(2)點(diǎn)M在x軸上,若EMBEDEquation.DSMT4,求點(diǎn)M的坐標(biāo).58.(2023·四川眉山·統(tǒng)考中考真題)如圖,在平面直角坐標(biāo)系EMBEDEquation.DSMT4中,直線EMBEDEquation.DSMT4與x軸交于點(diǎn)EMBEDEquation.DSMT4,與y軸交于點(diǎn)EMBEDEquation.DSMT4,與反比例函數(shù)EMBEDEquation.DSMT4在第四象限內(nèi)的圖象交于點(diǎn)EMBEDEquation.DSMT4.

(1)求反比例函數(shù)的表達(dá)式:(2)當(dāng)EMBEDEquation.DSMT4時(shí),直接寫出x的取值范圍;(3)在雙曲線EMBEDEquation.DSMT4上是否存在點(diǎn)P,使EMBEDEquation.DSMT4是以點(diǎn)A為直角頂點(diǎn)的直角三角形?若存在,求出點(diǎn)P的坐標(biāo);若不存在,請(qǐng)說(shuō)明理由.題型四反比例函數(shù)的應(yīng)用59.(2020·廣東省·中考模擬)某化工車間發(fā)生有害氣體泄漏,自泄漏開(kāi)始到完全控制利用了40min,之后將對(duì)泄漏有害氣體進(jìn)行清理,線段DE表示氣體泄漏時(shí)車間內(nèi)危險(xiǎn)檢測(cè)表顯示數(shù)據(jù)y與時(shí)間x(min)之間的函數(shù)關(guān)系(0≤x≤40),反比例函數(shù)y=對(duì)應(yīng)曲線EF表示氣體泄漏控制之后車間危險(xiǎn)檢測(cè)表顯示數(shù)據(jù)y與時(shí)間x(min)之間的函數(shù)關(guān)系(40≤x≤?).根據(jù)圖象解答下列問(wèn)題:(1)危險(xiǎn)檢測(cè)表在氣體泄漏之初顯示的數(shù)據(jù)是__________;(2)求反比例函數(shù)y=_____的表達(dá)式,并確定車間內(nèi)危險(xiǎn)檢測(cè)表恢復(fù)到氣體泄漏之初數(shù)據(jù)時(shí)對(duì)應(yīng)x的值.60.實(shí)驗(yàn)數(shù)據(jù)顯示,一般成人喝半斤低度白酒后,1.5小時(shí)內(nèi)其血液中酒精含量EMBEDEquation.DSMT4(毫克/百毫升)與時(shí)間x(時(shí))成正比例;1.5小時(shí)后(包括1.5小時(shí))y與x成反比例.根據(jù)圖中提供的信息,解答下列問(wèn)題:(1)求一般成人喝半斤低度白酒后,y與EMBEDEquation.DSMT4之間的兩個(gè)函數(shù)關(guān)系式及相應(yīng)的自變量EMBEDEquation.DSMT4取值范圍;(2)依據(jù)人的生理數(shù)據(jù)顯示,當(dāng)EMBEDEquation.DSMT4時(shí),肝部正被嚴(yán)重?fù)p傷,請(qǐng)問(wèn)喝半斤低度白酒后,肝部被嚴(yán)重?fù)p傷持續(xù)多少小時(shí)?61.(2020·廣西玉林·中考真題)南寧至玉林高速鐵路已于去年開(kāi)工建設(shè),玉林輛隧道是全線控制性隧道,首期打通共有土石方總量600千立方米,總需要時(shí)間y天,且完成首期工程限定時(shí)間不超過(guò)600天.設(shè)每天打通土石方x千立方米.(1)求y與x之間的函數(shù)關(guān)系式及自變量x的取值范圍;(2)由于工程進(jìn)度的需要,實(shí)際平均每天挖掘土石方比原計(jì)劃多0.2千立方米,工期比原計(jì)劃提前了100天完成,求實(shí)際挖掘了多少天才能完成首期工程?62.教室里的飲水機(jī)接通電源就進(jìn)入自動(dòng)程序,開(kāi)機(jī)加熱時(shí)每分鐘上升EMBEDEquation.DSMT4,加熱到EMBEDEquation.DSMT4停止加熱,水溫開(kāi)始下降,此時(shí)水溫EMBEDEquation.DSMT4(EMBEDEquation.DSMT4)與開(kāi)機(jī)后用時(shí)EMBEDEquation.DSMT4(EMBEDEquation.DSMT4)成反比例關(guān)系,直至水溫降至EMBEDEquation.DSMT4,飲水機(jī)關(guān)機(jī),飲水機(jī)關(guān)機(jī)后即刻自動(dòng)開(kāi)機(jī),重復(fù)上述自動(dòng)程序.若在水溫為EMBEDEquation.DSMT4時(shí)接通電源,水溫EMBEDEquation.DSMT4(EMBEDEquation.DSMT4)與時(shí)間EMBEDEquation.DSMT4(EMBEDEquation.DSMT4)的關(guān)系如圖所示:(1)分別寫出水溫上升和下降階段EMBEDEquation.DSMT4與EMBEDEquation.DSMT4(EMBEDEquation.DSMT4)之間的函數(shù)表達(dá)式;(2)嘉淇同學(xué)想喝高于EMBEDEquation.DSMT4的水,請(qǐng)問(wèn)她最多需要等待多長(zhǎng)時(shí)間?63.電子體重科讀數(shù)直觀又便于攜帶,為人們帶來(lái)了方便.某綜合實(shí)踐活動(dòng)小組設(shè)計(jì)了簡(jiǎn)易電子體重秤:制作一個(gè)裝有踏板(踏板質(zhì)量忽略不計(jì))的可變電阻R1,R1與踏板上人的質(zhì)量m之間的函數(shù)關(guān)系式為R1=km+b(其中k,b為常數(shù),0≤m≤120),其圖象如圖1所示;圖2的電路中,電源電壓恒為8伏,定值電阻R0的阻值為30歐,接通開(kāi)關(guān),人站上踏板,電壓表顯示的讀數(shù)為U0,該讀數(shù)可以換算為人的質(zhì)量m,溫馨提示:①導(dǎo)體兩端的電壓U,導(dǎo)體的電阻R,通過(guò)導(dǎo)體的電流I,滿足關(guān)系式I=EMBEDEquation.DSMT4;②串聯(lián)電路中電流處處相等,各電阻兩端的電壓之和等于總電壓.(1)求k,b的值;(2)求R1關(guān)于U0的函數(shù)解析式;(3)用含U0的代數(shù)式表示m;(4)若電壓表量程為0~6伏,為保護(hù)電壓表,請(qǐng)確定該電子體重秤可稱的最大質(zhì)量.題型五反比例函數(shù)的綜合應(yīng)用64.(2023·四川廣安·統(tǒng)考中考真題)如圖,一次函數(shù)EMBEDEquation.DSMT4(EMBEDEquation.DSMT4為常數(shù),EMBEDEquation.DSMT4)的圖象與反比例函數(shù)EMBEDEquation.DSMT4為常數(shù),EMBEDEquation.DSMT4的圖象在第一象限交于點(diǎn)EMBEDEquation.DSMT4,與EMBEDEquation.DSMT4軸交于點(diǎn)EMBEDEquation.DSMT4.

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