2020-2021學(xué)年福建省泉州市安溪縣八年級(上)期中數(shù)學(xué)試卷 解析版

63354122222226335412222222學(xué)年福省泉州市溪縣八年（上）期數(shù)學(xué)試卷一選題本共小題每題分，40分.在小發(fā)的個項(xiàng)，有項(xiàng)符題要的

A

B

C

D4ABa

C

DAa+a

Ba

DaABCDA

B

C

DDCDADABEAABACBBCDCDAxC++1

B+1D+1++36A6BD

2223223222232232x8xA8B80D10MN80ABCDBC+2041.52CF2BEA

B

C

D二填題本題6小題每題4分共24分.23a12x

13A2babab14ABCFDEF105C45B

15eq\o\ac(△,Rt)ABCABC90BCBDACDEABEEFBDFEFAE16x+2+2017x+2三解題本共9小題共86分解應(yīng)出字明證過或算驟.17

3mn2223mn222183xx19ABDEBCEBFECADDF203a

2138xcmxcm1x22220a323295522﹣2481d3d22a2dd23ADDEDFNABAC1DF2DMDNADM50

2222222222222222222222222222224a+b+4+5x+4x+5+4+2+5x+2+1x+20x+2x+20+2+1x+4x1﹣2x10+333x++120x+25eq\o\ac(△,Rt)AOB9011eq\o\ac(△,Rt)AOBBBOeq\o\ac(△,Rt)AOBeq\o\ac(△,Rt)eq\o\ac(△,Rt)AOBAOFOBN140N

EF+AF2eq\o\ac(△,Rt)AOBAO86AB10eq\o\ac(△,Rt)AOBBOeq\o\ac(△,Rt)ABCACADCACOABCDPACPPMMPHHPDPPM++PD

633541223335663354122333564281210學(xué)年福省泉州市溪縣八年（上）期數(shù)學(xué)試卷參考答案與試題解析一選題共10小題）

A

B

C

D4

A

B

C

D理

B0.CD

3DaAa+a

Ba

Da接+a2B

aa

C）aDa

ABCD分BCDA

B

C

D

2BC.2D

4CDCDADABEAABACBBCDCD

222222222222222322222222222222232ACBBCCADCASAABEDCDBEACDDAxC++1

B+1D+1利xxBx

xxx1C++1Dxxxx1C++36A6BD+mxx+mxx，m12Cx8xA8B80Dxxxm8x+mxxx8m

322322x9x+mxm+8m810MN80ABCDBC+2041.52CF2BEA

B

C

D根EGGFEGFGHGDFEFabAEbb+b+bx+20bxAB1015xx+300

221+12222223223221+12222223223223222232222x0x0BC20300④D二填題共小題23aa根a

12xxaabbx12+1+1113A2babab

4abb

ab6aAbab28ab6ab4ab14ABCFDEF105C45B30先F105BABCFDEBACF

23222232222223232222322222232BAC+C180B180105303015eq\o\ac(△,Rt)ABCABC90BCBDACDEABEEFBDFEFAE7ABCABEF12BCAEBDADBAF+90AFFEBABCEF12ABBE716x+2+2017x+2

x+2x2xx+2017x++2xxx+xxx+2017+2

22222222222222xx+2020xx+2xxx+3+22xx+2x++4040+24040173+87183xxx4x19819ABDEBCEBFECADDFBEEFABDEBE

mn3﹣n3﹣nmmn3﹣n3﹣nm3nmn3222EC+FC+FCEFDEFABCDEFDF203a

aaa3a6

2272138xcmxcm1x222x+640x

2222222222222222222222240+78x440x+78x+78xx20+39x220a323295522﹣2481d3292a2dd2da28da84339322d8d28da8a24aa

4a228a5

aadaa24aad2a23ADDEDFN

DEMDFNADEADFADMDEMDFNDMEDMEDME2222222DEMDFNADEADFADMDEMDFNDMEDMEDME2222222222ABAC1DF2DMDNADM50DEDF2Req\o\ac(△,t)DEMeq\o\ac(△,Rt)DFNeq\o\ac(△,Rt)ADEeq\o\ac(△,Rt)ADFDMEADABCDEDFDEDF2eq\o\ac(△,Rt)DEMeq\o\ac(△,Rt)DFNeq\o\ac(△,Rt)DEMeq\o\ac(△,Rt)DFN△eq\o\ac(△,S)eq\o\ac(△,Rt)ADEeq\o\ac(△,Rt)ADFeq\o\ac(△,Rt)eq\o\ac(△,Rt)ADF△eq\o\ac(△,S)△△△36+△△7△24a+b+4+5x

x+5+4+2

2

x+2

+1x+20x+2

2222222222222222222222222222x+20+2+1x+4x1﹣22x

x+333x++120x+23222x10+33x5x10+332x++120yxx12xx612xy2125eq\o\ac(△,Rt)AOB9011eq\o\ac(△,Rt)AOBBBOeq\o\ac(△,Rt)AOBeq\o\ac(△,Rt)eq\o\ac(△,Rt)AOBAOFOBN140NEF+AF2eq\o\ac(△,Rt)AOBAO86AB10eq\o\ac(△,Rt)AOBBOeq\o\ac(△,Rt)ABCACADCACOABCDPACPPMMPHHPDPPM++PD

BEBEN90NBEeq\o\ac(△,Rt)BFEOFEF2BPPMPH9.6PD++eq\o\ac(△,Rt)AOBeq\o\ac(△,Rt)BENOAABO70