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→?題型突破←→?專(zhuān)題精練←題型一實(shí)數(shù)的有關(guān)概念1.(2023·四川達(dá)州·統(tǒng)考中考真題)SKIPIF1<0的倒數(shù)是(

)A.SKIPIF1<0 B.2023 C.SKIPIF1<0 D.SKIPIF1<02.(2022·湖南邵陽(yáng))-2022的絕對(duì)值是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.-2022 D.20223.(2023·重慶·統(tǒng)考中考真題)8的相反數(shù)是(

)A.SKIPIF1<0 B.8 C.SKIPIF1<0 D.SKIPIF1<04.(2023年安徽省滁州市南片五校中考二模數(shù)學(xué)試卷)SKIPIF1<0的倒數(shù)是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.(2022·安徽)下列為負(fù)數(shù)的是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.0 D.SKIPIF1<06.(2020·河北中考真題)下列各組數(shù)中,互為相反數(shù)的是()A.2和-2 B.-2和SKIPIF1<0 C.-2和SKIPIF1<0 D.SKIPIF1<0和27.(2020·江蘇儀征·初三一模)一個(gè)數(shù)的相反數(shù)是-2020,則這個(gè)數(shù)是()A.2020 B.-2020 C.SKIPIF1<0 D.SKIPIF1<08.(2020·遼寧鞍山·中考真題)SKIPIF1<0的絕對(duì)值是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<09.(2020·福建南安·初三其他)下列各數(shù)中,為負(fù)數(shù)的是()A.﹣(﹣3) B.|﹣3| C.SKIPIF1<0 D.﹣310.(2020·重慶第二外國(guó)語(yǔ)學(xué)校初三其他)下列命題正確的是()A.絕對(duì)值等于本身的數(shù)是正數(shù)B.絕對(duì)值等于相反數(shù)的數(shù)是負(fù)數(shù)C.互為相反數(shù)的兩個(gè)數(shù)的絕對(duì)值相等D.絕對(duì)值相等的兩個(gè)數(shù)互為相反數(shù)11.(2020·黑龍江綏化·中考真題)化簡(jiǎn)SKIPIF1<0的結(jié)果正確的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<012.(2020·江蘇常州·中考真題)8的立方根是()A.2SKIPIF1<0 B.±2 C.±2SKIPIF1<0 D.213.(2020·湖南懷化·中考真題)下列數(shù)中,是無(wú)理數(shù)的是()A.SKIPIF1<0 B.0 C.SKIPIF1<0 D.SKIPIF1<014.(2022·湖南湘潭)如圖,點(diǎn)SKIPIF1<0、SKIPIF1<0表示的實(shí)數(shù)互為相反數(shù),則點(diǎn)SKIPIF1<0表示的實(shí)數(shù)是(

)A.2 B.-2 C.SKIPIF1<0 D.SKIPIF1<0題型二實(shí)數(shù)的分類(lèi)15.(2020·南昌市第一中學(xué)初一期中)有下列四個(gè)論斷:①﹣SKIPIF1<0是有理數(shù);②SKIPIF1<0是分?jǐn)?shù);③2.131131113…是無(wú)理數(shù);④π是無(wú)理數(shù),其中正確的是(

)A.4個(gè) B.3個(gè) C.2個(gè) D.1個(gè)題型三無(wú)理數(shù)的估算16.(2020?臺(tái)州中考真題)無(wú)理數(shù)10在()A.2和3之間 B.3和4之間 C.4和5之間 D.5和6之間17.(2020?達(dá)州中考真題)下列各數(shù)中,比3大比4小的無(wú)理數(shù)是()A.3.14 B.103 C.12 D.18.(2022·浙江舟山)估計(jì)SKIPIF1<0的值在(

)A.4和5之間 B.3和4之間 C.2和3之間 D.1和2之間19.(2020?福州中考模擬)若a<28A.1 B.2 C.3 D.420.(2022·四川瀘州)與SKIPIF1<0最接近的整數(shù)是(

)A.4 B.5 C.6 D.721.(2022·重慶)估計(jì)SKIPIF1<0的值應(yīng)在(

)A.10和11之間 B.9和10之間 C.8和9之間 D.7和8之間22.(2022·江蘇宿遷)滿足SKIPIF1<0的最大整數(shù)SKIPIF1<0是_______.題型四實(shí)數(shù)與數(shù)軸23.(2021·四川南充市·中考真題)數(shù)軸上表示數(shù)SKIPIF1<0和SKIPIF1<0的點(diǎn)到原點(diǎn)的距離相等,則SKIPIF1<0為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<024.(2022·江西)實(shí)數(shù)a,b在數(shù)軸上的對(duì)應(yīng)點(diǎn)的位置如圖所示,則下列結(jié)論中,正確的是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<025.(2019·青州市邵莊初級(jí)中學(xué)月考)SKIPIF1<0,SKIPIF1<0在數(shù)軸上位置如圖所示,則SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0的大小順序是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<026.(2019·福建中考真題)如圖,數(shù)軸上A、B兩點(diǎn)所表示的數(shù)分別是-4和2,點(diǎn)C是線段AB的中點(diǎn),則點(diǎn)C所表示的數(shù)是_______.27.(2020·江西撫州·初一期末)定義SKIPIF1<0,則SKIPIF1<0_______________________________.題型五實(shí)數(shù)的大小比較28.(2020·四川大竹·初三期末)有理數(shù)a、b在數(shù)軸上的位置如圖所示,且|a|<|b|,下列各式中正確的個(gè)數(shù)是()①a+b<0;②b﹣a>0;③SKIPIF1<0;④3a﹣b>0;⑤﹣a﹣b>0.A.2個(gè) B.3個(gè) C.4個(gè) D.5個(gè)29.(2019·廣東中考真題)實(shí)數(shù)SKIPIF1<0、SKIPIF1<0在數(shù)軸上的對(duì)應(yīng)點(diǎn)的位置如圖所示,下列式子成立的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<030.(2021·四川中考真題)若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則a,b,c的大小關(guān)系為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<031.(2020·湖北荊州·中考真題)若SKIPIF1<0,則a,b,c的大小關(guān)系是_______.(用<號(hào)連接)題型六非負(fù)性的運(yùn)用32.(2020·福建南平·初三二模)若m、n滿足SKIPIF1<0,則SKIPIF1<0的值等于().A.-1 B.1 C.-2 D.SKIPIF1<033.(2020·云南峨山·初二期末)△ABC的三邊的長(zhǎng)a、b、c滿足:SKIPIF1<0,則△ABC的形狀為().A.等腰三角形 B.等邊三角形 C.鈍角三角形 D.直角三角形34.(2020·黑龍江大慶·中考真題)若SKIPIF1<0,則SKIPIF1<0的值為()A.-5 B.5 C.1 D.-135.(2020·四川雅安·中考真題)已知SKIPIF1<0,則SKIPIF1<0的值是()A.4 B.6 C.8 D.1036.(2021·重慶中考真題)計(jì)算:SKIPIF1<0_______.37.(2022·四川瀘州)若SKIPIF1<0,則SKIPIF1<0________.38.(2021·云南中考真題)已知a,b都是實(shí)數(shù),若SKIPIF1<0則SKIPIF1<0_______.39.(2021·四川遂寧市·中考真題)若SKIPIF1<0,則SKIPIF1<0_____.題型七近似數(shù)和科學(xué)記數(shù)法40.(2021·甘肅武威市·中考真題)中國(guó)疫苗撐起全球抗疫“生命線”!中國(guó)外交部數(shù)據(jù)顯示,截止2021年3月底,我國(guó)已無(wú)償向80個(gè)國(guó)家和3個(gè)國(guó)際組織提供疫苗援助.預(yù)計(jì)2022年中國(guó)新冠疫苗產(chǎn)能有望達(dá)到50億劑,約占全球產(chǎn)能的一半,必將為全球抗疫作出重大貢獻(xiàn).?dāng)?shù)據(jù)“50億”用科學(xué)記數(shù)法表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<041.(2020·浙江嘉興·中考真題)2020年3月9日,中國(guó)第54顆北斗導(dǎo)航衛(wèi)星成功發(fā)射,其軌道高度約為36000000m.?dāng)?shù)36000000用科學(xué)記數(shù)法表示為()A.0.36×108 B.36×107 C.3.6×108 D.3.6×10742.(2021·江蘇連云港市·中考真題)2021年5月18日上午,江蘇省人民政府召開(kāi)新聞發(fā)布會(huì),公布了全省最新人口數(shù)據(jù),其中連云港市的常住人口約為4600000人.把“4600000”用科學(xué)記數(shù)法表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<043.(2019·四川中考真題)用四舍五入法將SKIPIF1<0精確到千位,正確的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<044.(2020·福建中考真題)2020年6月9日,我國(guó)全海深自主遙控潛水器“海斗一號(hào)”在馬里亞納海溝刷新了我國(guó)潛水器下潛深度的紀(jì)錄,最大下潛深度達(dá)10907米.假設(shè)以馬里亞納海溝所在海域的海平面為基準(zhǔn),記為0米,高于馬里亞納海溝所在海域的海平面100米的某地的高度記為SKIPIF1<0米,根據(jù)題意,“海斗一號(hào)”下潛至最大深度10907米處,該處的高度可記為_(kāi)________米.45.(2020·浙江溫州·中考真題)原子鐘是以原子的規(guī)則振動(dòng)為基礎(chǔ)的各種守時(shí)裝置的統(tǒng)稱(chēng),其中氫脈澤鐘的精度達(dá)到了1700000年誤差不超過(guò)1秒.?dāng)?shù)據(jù)1700000用科學(xué)記數(shù)法表示()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<046.(2020·湖北荊門(mén)·中考真題)據(jù)央視網(wǎng)消息,全國(guó)廣大共產(chǎn)黨員積極響應(yīng)黨中央號(hào)召,踴躍捐款,表達(dá)對(duì)新冠肺炎疫情防控工作的支持,據(jù)統(tǒng)計(jì),截至2020年3月26日,全國(guó)已有7901萬(wàn)多名黨員自愿捐款,共捐款82.6億元,82.6億用科學(xué)記數(shù)法可表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<047.(2021·四川瀘州市·中考真題)第七次全國(guó)人口普查統(tǒng)計(jì),瀘州市常住人口約為4254000人,將4254000用科學(xué)記數(shù)法表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<048.(2021·浙江溫州市·中考真題)第七次全國(guó)人口普查結(jié)果顯示,我國(guó)具有大學(xué)文化程度的人口超218000000人.?dāng)?shù)據(jù)218000000用科學(xué)記數(shù)法表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<049.(2021·浙江紹興市·中考真題)第七次全國(guó)人口普查數(shù)據(jù)顯示,紹興市常住人口約為5270000人,這個(gè)數(shù)字5270000用科學(xué)記數(shù)法可表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<050.(2021·四川涼山彝族自治州·中考真題)“天問(wèn)一號(hào)”在經(jīng)歷了7個(gè)月的“奔火”之旅和3個(gè)月的“環(huán)火”探測(cè),完成了長(zhǎng)達(dá)5億千米的行程,登陸器“祝融”號(hào)火星車(chē)于2021年5月15日7時(shí)18分從火星發(fā)來(lái)“短信”,標(biāo)志著我國(guó)首次火星登陸任務(wù)圓滿成功,請(qǐng)將5億這個(gè)數(shù)用科學(xué)記數(shù)法表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<051.(2021·浙江嘉興市·中考真題)2021年5月22日,我國(guó)自主研發(fā)的“祝融號(hào)”火星車(chē)成功到達(dá)火星表面.已知火星與地球的最近距離約為55000000千米,數(shù)據(jù)55000000用科學(xué)記數(shù)法表示為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<052.(2021·安徽中考真題)《2020年國(guó)民經(jīng)濟(jì)和社會(huì)發(fā)展統(tǒng)計(jì)公報(bào)》顯示,2020年我國(guó)共資助8990萬(wàn)人參加基本醫(yī)療保險(xiǎn).其中8990萬(wàn)用科學(xué)記數(shù)法表示為()A.89.9×106 B.8.99×107 C.8.99×108 D.0.899×109題型八二次根式的概念與性質(zhì)53.(2023·湖南·統(tǒng)考中考真題)對(duì)于二次根式的乘法運(yùn)算,一般地,有SKIPIF1<0.該運(yùn)算法則成立的條件是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<054.(2021·四川涼山彝族自治州·中考真題)SKIPIF1<0的平方根是()A.SKIPIF1<0 B.3 C.SKIPIF1<0 D.955.(2021·湖南衡陽(yáng)市·中考真題)下列計(jì)算正確的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<056.(2021·浙江杭州市·中考真題)下列計(jì)算正確的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<057.(2021·上海中考真題)下列實(shí)數(shù)中,有理數(shù)是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<058.(2021·甘肅武威市·中考真題)下列運(yùn)算正確的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<059.(2021·重慶中考真題)計(jì)算SKIPIF1<0的結(jié)果是()A.7 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<060.(2021·浙江麗水市·中考真題)要使式子SKIPIF1<0有意義,則x可取的一個(gè)數(shù)是__________.61.(2021·湖南衡陽(yáng)市·中考真題)要使二次根式SKIPIF1<0有意義,則SKIPIF1<0的取值范圍是________.62.(2021·浙江金華市·中考真題)二次根式SKIPIF1<0中,x的取值范圍是___.63.(2021·四川廣安市·中考真題)在函數(shù)SKIPIF1<0中,自變量x的取值范圍是___.64.(2022·湖北武漢)計(jì)算SKIPIF1<0的結(jié)果是_________.65.(2021·湖南岳陽(yáng)市·中考真題)已知SKIPIF1<0,則代數(shù)式SKIPIF1<0______.66.(2022·湖北荊州)若SKIPIF1<0的整數(shù)部分為a,小數(shù)部分為b,則代數(shù)式SKIPIF1<0的值是______.題型九實(shí)數(shù)的運(yùn)算67.(2023·河北·統(tǒng)考中考真題)若SKIPIF1<0,則SKIPIF1<0(

)A.2 B.4 C.SKIPIF1<0 D.SKIPIF1<068.(2023·山東聊城·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0______.69.(2018·云南·中央民族大學(xué)附屬中學(xué)昆明五華實(shí)驗(yàn)學(xué)校??家荒#┯?jì)算:SKIPIF1<0SKIPIF1<0______70.(2021春·廣西南寧·八年級(jí)統(tǒng)考期中)計(jì)算(SKIPIF1<0+SKIPIF1<0)(SKIPIF1<0﹣SKIPIF1<0)的結(jié)果為_(kāi)_________.71.(2023·天津·統(tǒng)考中考真題)計(jì)算SKIPIF1<0的結(jié)果為_(kāi)_______.72.(2021·安徽中考真題)計(jì)算:SKIPIF1<0______.73.(2021·重慶中考真題)計(jì)算:SKIPIF1<0__________.74.(2023·浙江金華·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0.75.(2023·四川自貢·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0.76.(2023·四川瀘州·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0.77.(2023·浙江·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0.78.(2023·四川廣安·統(tǒng)考中考真題)計(jì)算:SKIPIF1<079.(2023·江蘇連云港·統(tǒng)考中考真題)計(jì)算SKIPIF1<0.80.(2023·四川眉山·統(tǒng)考中考真題)計(jì)算:SKIPIF1<081.(2023·云南·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0.82.(2023·湖南懷化·統(tǒng)考中考真題)計(jì)算:SKIPIF1<083.(2023·甘肅武威·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0.84.(2023·浙江臺(tái)州·統(tǒng)考中考真題)計(jì)算:SKIPIF1<0.85.(2023·四川樂(lè)山·統(tǒng)考中考真題)計(jì)算:SKIPIF1<086.(2023·上?!そy(tǒng)考中考真題)計(jì)算:SKIPIF1<087.(2023·四川遂寧·統(tǒng)考中考真題)計(jì)算:SKIPIF1<088.(2022·新疆)計(jì)算:SKIPIF1<089.(2022·四川瀘州)計(jì)算:SKIPIF1<0.90.(2022·浙江麗水)計(jì)算:SKIPIF1<0.91.(2022·湖南邵陽(yáng))計(jì)算:SKIPIF1<0.92.(2022·陜西)計(jì)算:SKIPIF1<0.93.(2020·陜西其他)SKIPIF1<0.94.(2022·湖南株洲)計(jì)算:SKIPIF1<0.95.(2022·四川眉山)計(jì)算:SKIPIF1<0.96.(2022·江蘇連云港)計(jì)算:SKIPIF1<0.97.(2022·浙江金華)計(jì)算:SKIPIF1<0.98.(2022·四川德陽(yáng))計(jì)算:SKIPIF1<0.99.(2020·江蘇新北·初三一模)計(jì)算:SKIPIF1<0﹣2sin45°+(SKIPIF1<0)﹣1﹣|2﹣SKIPIF1<0|.100.(2020·內(nèi)蒙古呼和浩特·中考真題)計(jì)算:SKIPIF1<0;101.(2020·湖北孝感·中考真題)計(jì)算:SKIPIF1<0102.(2021·四川自貢市·中考真題)計(jì)算:SKIPIF1<0.102.(2021·浙江麗水市·中考真題)計(jì)算:SKIPIF1<0.104.(2021·甘肅武威市·中考真題)計(jì)算:SKIPIF1<0.105.(2021·四川遂寧市·中考真題)計(jì)算:SKIPIF1<0106.(2022·浙江杭州)計(jì)算:SKIPIF1<0.圓圓在做作業(yè)時(shí),發(fā)現(xiàn)題中有一個(gè)數(shù)字被墨水污染了.(1)如果被污染的數(shù)字是SKIPIF1<0,請(qǐng)計(jì)算SKIPIF1<0.(2)如果計(jì)算結(jié)果等于6,求被污染的數(shù)字.題型十?dāng)?shù)字規(guī)律107.(2021·四川眉山市·中考真題)觀察下列等式:SKIPIF1<0;SKIPIF1<0;SKIPIF1<0;……根據(jù)以上規(guī)律,計(jì)算SKIPIF1<0______.題型十一新定義108.(2022·湖南常德)我們發(fā)現(xiàn):SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,…,SKIPIF1<0,一般地,對(duì)于正整數(shù)SKIPIF1<0,SKIPIF1<0,如果滿足SKIPIF1<0時(shí),稱(chēng)SKIPIF1<0為一組完美方根數(shù)對(duì).如上面SKIPIF1<0是一組完美方根數(shù)對(duì).則下面4個(gè)結(jié)論:①SKIPIF1<0是完美方根數(shù)對(duì);②SKIPIF1<0是完美方根數(shù)對(duì);③若SKIPIF1<0是完美方根數(shù)對(duì),則SKIPIF1<0;④若SKIPIF1<0是完美方根數(shù)對(duì),則點(diǎn)SKIPIF1<0在拋物線SKIPIF1<0上.其中正確的結(jié)論有(

)A.1個(gè) B.2個(gè) C.3個(gè) D.4個(gè)109.(2022·四川眉山)將一組數(shù)SKIPIF1<0,2,SKIPIF1<0,SKIPIF1<0,…,SKIPIF1<0,按下列方式進(jìn)行排列:SKIPIF1<0,2,SKIPIF1<0,SKIPIF1<0;SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,4;…若2的位置記為SKIPIF1<0,SKIPIF1<0的位置記為SKIPIF1<0,則SKIPIF1<0的位置記為_(kāi)_______.110.(2020·四川宜賓·中考真題)定義:分?jǐn)?shù)SKIPIF1<0(m,n為正整數(shù)且互為質(zhì)數(shù))的連分?jǐn)?shù)(其中為整數(shù),且等式右邊的每一個(gè)分?jǐn)?shù)的分子都為1),記作SKIPIF1<0:例如SKIPIF1<0,SKIPIF1<0的連分?jǐn)?shù)是SKIPIF1<0,記作SKIPIF1<0,則________________SKIPIF1<0.111.(2022·四川達(dá)州)人們把SKIPIF1<0這個(gè)數(shù)叫做黃金比,著名數(shù)學(xué)家華羅庚優(yōu)選法中的“0.618法”就應(yīng)用了黃金比.設(shè)SKIPIF1<0,SKIPIF1<0,記SKIPIF1<0,SKIPIF1<0,…,SKIPIF1<0,則SKIPIF1<0_______.112.(2021·重慶中考真題)對(duì)于任意一個(gè)四位數(shù)m,若千位上的數(shù)字與個(gè)位上的數(shù)字之和是百位上的數(shù)字與十位上的數(shù)字之和的2倍,則稱(chēng)這個(gè)四位數(shù)m為“共生數(shù)”例如:SKIPIF1<0,因?yàn)镾KIPIF1<0,所以3507是“共生數(shù)”:SKIPIF1<0,因?yàn)镾KIPIF1<0,所以4135不是“共生數(shù)”;(1)判斷5313,6437是否為“共生數(shù)”?并說(shuō)明理由;(2)對(duì)于“共生數(shù)”n,當(dāng)十位上的數(shù)字是千位上的數(shù)字的2倍,百位上的數(shù)字與個(gè)位上的數(shù)字之和能被9整除時(shí),記SKIPIF1<0.求滿足SKIPIF1<0各數(shù)位上的數(shù)字之和是偶數(shù)的所有n.113.(2021·四川涼山彝族自治州·中考真題)閱讀以下材料,蘇格蘭數(shù)學(xué)家納皮爾(J.Npler,1550-1617年)是對(duì)數(shù)的創(chuàng)始人,他發(fā)明對(duì)數(shù)是在指數(shù)書(shū)寫(xiě)方式之前,直到18世紀(jì)瑞士數(shù)學(xué)家歐拉(Evler.1707-1783年)才發(fā)現(xiàn)指數(shù)與對(duì)數(shù)之間的聯(lián)系.對(duì)數(shù)的定義:一般地.若SKIPIF1<0(SKIPIF1<0且SKIPIF1<0),那么x叫做以a為底N的對(duì)數(shù),記作SKIPIF1<0,比如指數(shù)式SKIPIF1<0可以轉(zhuǎn)化為對(duì)數(shù)式SKIPIF1<0,對(duì)數(shù)式SKIPIF1<0可以轉(zhuǎn)化為指數(shù)式SKIPIF1<0

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