第十七届五羊杯初中数学竞赛初三试题

20051190100550153725672xx+−+=+−A2B3C5D62272|3|4xxx−−−−xA4xB17x≥5x≠C4x5x≠D45x31FACABCAFFC=25GBFAGBCEBEEC=A14B27C25D3842AB//CDBCDCPCQCRCPB=78RCE=A66B65C58D565||31xx=+22005(64489)xx++=A0B1C−1D6Aoshoo.comnk1(3)(1)4Ann=+−+21(5)4AnA=++32(7)4AnA=++1(21)4kkAnkA−=+++1002005A=n=A1806B2005C3612D401173EFDAABABCD5BCDEF51719232738A966B920C880D8321A2B3C4D59ab=ab+2a+2b+2x22222=5118x=A1B2C3D101/5672/5673/567567/567A284B283C163D162550111(20.052)7198−÷=_____12113xy=+2523xxyyyxyx−−=+−_____13()()()()16abcdbcadcabdabcdabcd++++−−+−−+−−+____________ABPQRDEC142222222222444444444411111132435441012S=+++++++++++++++=_____151~2005_____x313x+3x516BUBVDMDN4ABCDBCDAUVMNAUBNPCMDVQMNPUVQ80ABPCDQ30ABCD_____17ab363abab−+=a+2b_____185ABCMN//BCIJ//ACEF//ABBFPMCNPJ7030ABC225AEPI_____19DBCABCBCA=135ADBCBD=4DC=66ABC_____20=÷×=25=4=_____JINMFEABCP