2020-2021學年四川省成都市龍泉驛區(qū)七年級(下)期末數學試卷

342363423622282612222學年四省成都市泉驛區(qū)七級（下）末數學試卷一單題共小題滿30分每題分A

B

C

DAaCb4+

BaabDaall1A14

B

C84

DA51BC1DAaC2x+4x

B+11mDACFADCFFDEFABCBABCBDABDE

002陰影002陰影A15B20CD2025ABCACDBDACcmA18BC20D213A

B

C

DPKcmAL10+0.5PBLLL80+5二填題共4小題，分分，每題4分11xx+m12BCADDE1

△30232△30232322S三解題共6小題，分分）1+2020+2aab3ab+4a1ABCAmnyx1A2x150315ABCDBFBFDF

ABCDEBCACBDDEBADDE四填空（小，分分每題4分）22aaCBAABACMNNMNPAPBCDCDDB

ABCDDCDMN五解答（小，分分每題10分）ACBDCE90DE1ADBE2AEB1PABCBCPBCP12QABBCQMCQABBCAQCPMQMC1DECCFAD

1BCE2BE2DEC090BCDFADECF

3423622282342362228263412236322281參考答案與試題解析一單題共小題滿30分每題分A

B

C

DABCDBAa

BaabCb

a

+b

Da

aa2aba2ab＝4+4abaDDll1A14

B

C84

D

12221222222222ll1AOB7622AOB76BA51BC1DA5B10%C000DDAaC2x+4x

B+11mDAaB1C4x4+1DBACFADCFFDEF

ABCBABCBDABDEADCFDFFSASDEFADEDEFBDEFDA15B20CD202555+5105+1010ABCACDBDACcmA18BC20D21ABDDADBCDDBBCCD+DABC+AC12cmcm+AC19cmB

000200023A

B

C

DBPKcmAL10+0.5PBLLL80+5100.550.5A二填題共4小題，分分，每題4分11xx+mx2x

22m8012

8014CD4280BCADDE1陰影S4△

ADE3023236ADE3023236622222222222222S△△1陰影△陰影DBC2△三解題共6小題，分分）1+2020+2aa8+110227a426ab3ab+4a1abab+b4

b3a

ab3+4baa224+12ABCAmn

ABCyx1A2x15031515035210200150x15013

ABCDBFBFDF

CEBFCD+ACDFBADDFABCDEBCACBDDEBADDEBCADCB+BADADE+BCDEDCEDCEADDE

2△2△四填空（小，分分每題4分）0810

a4|+00b5ab①444+4513②441313BFABCAB6

S

ADCE

CBAABACMNNMNPAP

BCDCDDBABCC90BADBACCAD

CABBDBAD2CD10ABCDDCDMNABABAABADDABCCDM90AACDAMNMBABMAMANANAAMABAAMNA+MABAA+2AMNANM2A+

A+ABADAMNANM21101807070五解答（小，分分每題10分）ACBDCE90DE1ADBE2AEBACBDCEBCCD+DCB+DCB90ACDBCEBCEACDBCEAD2145CEDAEBCEB13545

1PABCBCPBCP12QABBCQMCQABBCAQCPMQMCABQCAPCACAPABQCAP2PQMCABQBAQQMCACP+QMC3PABABQBAQQMCAPM

QMCACP+APM1801DECCFAD1BCE2BE2DEC090BCDFADECF