2020-2021学年广东省深圳高级中学八年级(上)期末数学试卷

学年广省深圳高中学八年第一学期末数学试卷一选题共10小）202188366A8.366

B108

C108

D83.66A1

xy2xayaB2CD4AnxnA

B

C

DABA10

B15

C20

D252aa+2A1B3D3DEBCEACACEA161822DABCDABCEPBCPEAD8

11A8B6CD4StA

BC

Dx+5xBCA9

B8

C7

D10xA43

aB3C21Da二填题共15分）115b12y+xkx

13nn1122113nn11221+112n12334nn12234nn+14413yx+nym13114

xAAAOAAAAA4AA2nA

xBBAABABeq\o\ac(△,A)eq\o\ac(△,)BBeq\o\ac(△,A)eq\o\ac(△,)Beq\o\ac(△,A)eq\o\ac(△,)BBeq\o\ac(△,A)eq\o\ac(△,)1510

BDABCBDCENMBDAM三解题（题合55分答填答的定置上否不分）

16+

|

2|171218ABDC中A90AB912BD8CD1BC219123540020N952252只

1N95240%19021104M/1CNBAN2BMNCDMBMNNMBMCABCN

/22xACB2yABP123BAOCP

参考答案一选题共10小）202188366A8.366

B108

C108

D83.668366836600008.366107

xy2xayaA1B2C

D

xy2+6aaAnxnA

B

C

DA2n3nnDAB

A10

B15

C20

D25CDBAC

AED45AECCAE+ACE180EACACE3015BACACDAED45152aa+2A1

B3CD3aa+2a3a+23339CDEBCEACACEA161822DBC+EC+AEEB+ACAB+ACABCDABCEPBCPEAD8

122122A8B6CD4BCEADCEABCBCDAEPEDEPEADAD4PE4DStA

BC

DABC

DSCx+5xBCA9

B8

C7

Dyx05B5OA01055

BABC0505CC7C10xA43

aB3C21Da

ax2a64a3

二填题（小3分，分答案在卷指位上否不分）115b10AaBbabab521012y+xkxx112xkxnx1x113yx+nym1319141

13nn11221+112n113nn11221+112n12334nn12234nn+144nnnnn112112233nnnnn

xy5xy22114

xAAAOAAAAA4AA2

n

AAy

xBBAABABeq\o\ac(△,A)eq\o\ac(△,)BBeq\o\ac(△,A)eq\o\ac(△,)Beq\o\ac(△,A)eq\o\ac(△,)BBeq\o\ac(△,A)eq\o\ac(△,)120

OAy

xA60OAA2AAA2nBB

AB

S+2

n122+4+8+

n

22+4+8+Bn1

n

n1

1

BAA7120

n

1

2n

22n

2n1120

1510

BDABCBDCE

NMBDAM5

DEABCACBCBEBCDCBSASECBDBCBDCNBDECBCNEBADDCDEBCDE

△ABH△ABHENBE

10CN10

HBDMAM+EMEHHABTBDAHJEBNJ102EN10BJ2AH2AHHT

8

4

AT4EHAM5

5

三解题（题合55分答填答的定置上否不分）162+

|

2|

27

+21712

1xxx1.55y

2

x118ABDC中A90AB912BD8CD1BC21

152BC152225BD2

17

CD2

191235400118909018362314401440

4820

NMNMN952252只1N95240%1901N2zz27.5z3028292121104M/1CNBAN2BMNCDMBMNNMBMCABCN3.81CDM1t23cm

NNNNNNNN3cmBM1064cm1CD4BMCD1BCCDM②t

B6060BM3t10tB6060BM103tt

t

BMN2IM2525VV20325V3.83.822xACB2yABP

1+223BAOCP1yx4AC0C0ABkxbABxyx+22A4004B0OAOCOB2eq\o\ac(△,S)S468m