福州市2020-2021学年九年级(上)期末数学试题及答案-VIP

数学试题友情提示：请认真作答，把答案准确地填写在答题卡上第Ⅰ卷4）ABCD1到633，1），1），3）D1）O663D33）t/ht/ht/ht/hO/(/h)OOO/(/h)/(/h)/(/h)ABCDyx22x3x1＞1yxxmx22x10m九年级数学－1－（共5页）＜1＞1m＞1且m0D≥1且0与G3，2，6，则ABG6585CD．．．EF83D41x．x40x)．(x40x)．(x40(x．xxy(xxxx)1（x＜xxm1212则，x，x12．x＜xm＜x＜xn1212＜x＜xD．xm＜xn1212第Ⅱ卷64O．x2xxx2m0m．24xy3＜1y．QPOPPO于B，QAB2AOB是．从1223，6，，．AED点F3F3．BC98x2x10．2九年级数学－2－（共5页）8OCOlA作llODClAOB8ymxm1y(x4)23ABB3A-3-2-1O1234567891011/m8D2DA1612810%DB40%4C0ABCD课程图1图2AAA2A8DD．AEDBCyxbyykxyB2B．BCOx九年级数学－3－（共5页）AD在，，E是交．；AB2ADFBCE，，ABADE是交，．52，68，AEFBDOCBxyB，12Byx2c与xym）在第一象限交于DC．1D2P是xPyBOAx2020九年级数学－4－（共5页）评分说明：1．本解答给出了一种或几种解法供参考，如果考生的解法与本解答不同，可根据试题的主要考查内容比照评分参考制定相应的评分细则．2．对于计算题，当考生的解答在某一步出现错误时，如果后继部分的解答未改变该题的内容和难度，可视影响的程度决定后继部分的给分，但不得超过该部分正确解答应给分数的一半；如果后继部分的解答有较严重的错误，就不再给分．3．解答右端所注分数，表示考生正确做到这一步应得的累加分数．4．只给整数分数．选择题和填空题不给中间分．4BDDBBCCABA6443π．23．4＜663．8981，2，1，···························································································1分abcb42=(241(1)8．··································································································3分bb24··············································································································4分x2a（812，········································································································6分2即2，12．···································································································8分x1x2x2x1，··········································································································1分2x22x12，··················································································································3分(x22，······················································································································4分，·····················································································································6分x12x21，即x21，x21．································································································8分128．，∴·············································································································1分九年级数学－5－（共5页）∵，∴，·············································································································2分C∴，············································································································3分，······················································································································4分∴．····································································································5分AOB，∴，················································································································6分∴，················································································································7分．ClO的切线．·······································································································8分8）/mB3A-3-2-1O1234567891011/m·······································································································································4分．·····················································································5分1xy4)230，···································································6分，······················································································7分而························································································································8分．8，································································2分A4．············································································4分A甲乙丙丁甲乙丙丁·······································································································································6分··································7分221＝．····················································································8分616．8）九年级数学－6－（共5页）AEDBC·······································································································································3分A······································4分．A，∴，··············································································5分A∴．·············································································································6分EE∴．·············································································································7分D，∴······································································································8分BCC在y2，∴b2，··························································································································1分yx2．·····························································································2分将y3yx2x1，·····················································································································3分kxy，k1得3，··························································································································4分∴k3，3xy．···························································································5分y0yx2x2，D，2∴2．·······················································································································6分y3x3x将yx2yx2，BCx1，x3．··········································································································7分12D当x3y321，OxA3，1AA到x．····································································································8分B，B到x，····································································································9分1212∴SSS21234．······································································分△AOB△AOD△BOD，，∴．····················································································································2分∵，．············································································································4分···························································································5分，九年级数学－7－（共5页）∴，．····························································································6分∵，∴AB2．∵AB2，，AD即．···················································································································7分取，∴，F∴．·····················································································································8分BGCE∵，，∴．∵，，············································································································9分∴，∴，················································································································分，ABAD，52，∴．···································································································2分22∴．·················································································································3分在6，∴8．····································································································5分22．A作交，∴．∵，∴，．∵，，·············································································································6分12∴，．在8，∴．···································································································7分22∵，，ID86.4∴，∴，6．··········································································································8分A∵，EF∴，即．HG∵ABAD，BDO∴．I∵，∴，∴，C∴，·····················································································································9分H为···················································································分九年级数学－8－（共5页）∴6，∴2，12∴1．·············································································································分∵，AFHBFE，，AFAH1∴．·············································································································分BFBE6∴6．························································································································1分∵，，∴，∴6．·················································································································2分A在x18bc，12将yxc2c．b，······················································································································3分c．12yx4x6．·················································································4分2E作x，∴，y，，12∴，6，BE13∴OFOA2，F，FA4，E，4，OFAxE····································································································5分12将x1yx4x6yC··········································6分232由yx1，·····················································7分32121232将yx1yx4x6x4x6x1，22x1，x．··········································································································8分12C，D，32将xyx1y，D·································································································9分y设（x，yDDDC点PxBD＜x．DD作x，∴，∴．COHPAIx∵，九年级数学－9－（共5页）∴，∴，，2.5xtt1y∴，DD∴txt)2.5y································································································分DDkm，ym∴mk，·················································································································分(．ykx12将(ykxx46，yx2270，x2kxkx1，x2k7，CD（k7，26····························································································分k2k（k7，26k2k450，t2ktk2k4k32k20kk16k36k．222PPt，tt＜t．1212tt2k8，5．·······························································分tt12k2k412tt1，21∴()()41，tt2tt2tt2112124∴)1，k2k2k即kk50，21452，k1k214当16kkk21494x．·······················································································分y九年级数学10－（共5页）∴6，∴2，12∴1．·············································································································分∵，AFHBFE，，AFAH1∴．·············································································································分BFBE6∴6．························································································································1分∵，，∴，∴6．·················································································································2分A在x18bc，12将yxc2c．b，······················································································································3分c．12yx4x6．·················································································4分2E作x，∴，y，，12∴，6，BE13∴OFOA2，F，FA4，E，4，OFAxE····································································································5分12将x1yx4x6yC