当前位置:首页 >> 数学 >>

高中数学苏教版高一必修1_3.2.1第二课时_对数的运算性质及换底公式_作业 含解析

高中数学苏教版高一必修 1_3.2.1 第二课时_对数的运算性质及换底公式_作业 含解析 [学业水 平训练] 一、填空题 2 1.给出下列 4 个等式:①log253=3log25;②log253=5log23;③log84= ;④log 24 3 =4.其中正确的等式是________.(写出所有正确的序号) 1 解析:②中 log253= log23,故②不正确,①③④都正确. 5 答案:①③④ 2.2log510+log50.25 的值等于________. 解析:原式=log5102+log50.25=log5(102×0.25)=log525=2. 答案:2 log 16 3. 27 的值为________. log34 lg 16 lg 27 lg 16·lg 3 2lg 4·lg 3 2 解析:原式= = = = . lg 4 lg 27·lg 4 3lg 3·lg 4 3 lg 3 2 答案: 3 4.若 log34·log48·log8m=log416,则 m=________. lg 4 lg 8 lg m 解析:由已知,得 log34·log48·log8m= · · =log3m=2,∴m=32=9. lg 3 lg 4 lg 8 答案:9 2 1 1 5.log 2 +( )log2 =________. 2 2 4 1 1 解析:原式=log 2( )+2-log2 =-1+4=3. 4 2 答案:3 1 1 6.已知 2m=3n=36,则 + =________. m n 1 1 解析:m=log236,n=log336,∴ =log362, =log363, m n 1 1 1 ∴ + =log366= . m n 2 1 答案: 2 二、解答题 7.(1)已知 log95=a,log37=b,试用 a,b 表示 log2135. (2)已知 log35=m,log83=n,试用 m,n 表示 lg 5. log35 1 解:(1)由 log95=a,得 a= = log 5. log39 2 3 第1页 共3页 log335 log35+log37 2a+b ∴log2135= = = . log321 log33+log37 1+b lg 5 ? =m, ① ?log35=m ?lg 3 (2)由? ?? lg 3 ?log83=n ? ?3lg 2=n, ② lg 5 lg 5 ①×②,得 =mn,即 =mn, 3lg 2 3(1-lg 5) 3mn ∴lg 5= . 1+3mn 1 1 1 8.已知 3x=4y=6z,求证: + = . x 2y z x y z 证明:设 3 =4 =6 =t, 则 x=log3t,y=log4t,z=log6t(t>0,t≠1), 1 1 1 1 1 1 1 1 1 所以 + = + =logt3+logt2=logt6= = .∴ + = . x 2y log3t 2log4t log6t z x 2y z [高考水平训练] 一、填空题 1.lg( 3+ 5+ 3- 5)的值为________. 1 解析:原式= lg( 3+ 5+ 3- 5)2 2 1 = lg(6+2 9-5) 2 1 = . 2 1 答案: 2 4 2.计算 log8(log2 2)的值为________. 1 2 4 解析:log8(log2 2)=log8 =-2log82=- . 4 3 2 答案:- 3 二、解答题 1 1 1 3.设 xa=yb=zc,且 + = ,求证:z=xy. a b c a b c 证明:设 x =y =z =k, 1 lg x 1 lg y 1 lg z 则 = , = , = , a lg k b lg k c lg k lg x lg y lg z ∴ + = , lg k lg k lg k ∴lg(xy)=lg z,即 z=xy. 2 4.地震的震级 R 与地震释放的能量 E 的关系为 R= (lg E-11.4).2008 年 5 月 12 日, 3 中国汶川发生了 8.0 级特大地震,而 2011 年 3 月 11 日日本海域地震的震级为 9.0 级, 第2页 共3页 那么 2011 年地震的能量约是 2008 年地震的多少倍. 2 ? ?8=3(lg E1-11.4) ?lg E1=23.4 解:由题意可知:? ?? 2 ?lg E2=24.9 ? ?9=3(lg E2-11.4) E2 3 ? lg =lg E2-lg E1= . E1 2 3 3 E2 ∴ =102.故为 102倍. E1 第3页 共3页

以下是今天幸运会员获奖名单

www.jl2015.com|xpj0621.com|wwwvns8861com|hohoho|www.262012.com|www.tu5066.com|猫咪网址贴吧|py147258|se733.C0m|803201com|www.ks0588.com|9297986.com

wwwyh3502com|www.88uouo.com|www.408181.com|www.niuganyy.com|33bb|yxg1314|www.ngacn.cc|wwwhhcp2com|xpj3476com|WWW.0008353.COM|www020022com|www.hy278.com|45581.com|www.3095tt.com|www.173503.com|www70088182com|sufang123|67777com|kima88.com|js2424com|www.9295333.com|777111com|www.41660i.com|junzhu632|655778.com|lu2324com|yb5586com|www.5522js.com|ddlh168@163.com|1805687013@qq.com|www.673888.co|88838com|1137.ag|www.456k.cc|gou1987|www. ok22399.com|00080ncom|liaogh|wwwbb888com|bb445566|wwwxpj87123com|www.92994.com|www.s7778.com|wwwssc187com|js78977.com|42289com|www.bbb991.com|www642222com|hg8904com|激 情 污 污 群|wwwvn639com|zb182|yb8.me/app/mg_IgXh|www.167nn.com|fl0004|9058756.com|xpj71377gmail.com|www.58345n.com|www9866fcom|www.1199av.com|1480805.com|www.522520.com|www.hg3788.com|9991331.com|by6683com.|vss.yinzuo.cn|www.953js.cc|www9898365net|983nn.com|www.m755.com|www.lxyl9.com|wwwmpi777com|wwwbet8755com|a999888|bj28888Com|669476846|ok12345|www.8066889.com|www.m.hf010.com|mg1524.vip|www.1x07.com|www.34233999.com|xiaojie威客网官网2019|750749com|www.336g.cc|efwfs|342555.com|www.98777.com|www999bdbcom|www711789com|803940com|755543.com|www7500666com|10877r.com|wwwjs990wwcom|www.5787.com|www.2234|wwwfg4567com|bbs.mrcs.lezi.com|www.5524.com|itolwfn828@163.com|138677com|bet691com|dwj8cc|WWW.32076.COM|amvip196com|www.123789me|httpwww.s://m.baidu.com/from=10|WWW.DDH077.COM|kao998|xnxx.com|caipiao678.com|www.62188.com|zzz123123|www.729.com|1516zz.cc|789ww.com|js57711com|adds0769|www.117567.com|www.hs778.com|7004094com|www.leyoubaba.com|www.hg2428.com|8833k0|ww332|www.639tyc.com|wwwky2266com|wwwbm5858net|ijzz24|s7774.com|zyj251314|quhua314|qiangqiang@188.com|ag2445com|336688i.com|www.154391.com|www.625uu.com|www8349com|www111395com|www.bh32.com|www52567com|www.ha77188.com|www.444234.com|www.5004f.com|yabovip1061com|1705s.com|www9520hcom|www877hcom|www80567scom|23bbbb.com|www.dddd555.com|www74455com|www.99cc9.com|www.china.sss.com|www.vns74555.com|www.yh|wwwswin999net|2061289.com|0203123com|www.ab8.com|m1wnscom|www.372055.com|www.2765777.com|730331com|wwwhg0454com|vvff505@163.com|www.092654.com|

www.407.com|www938309com|wwwwt785com|www61834com|4045.com|www.669226.com|678949.com|www.aaa4488.com|www.118449.com|670269715|wwwhg88199com|251314|tk87.cc|www.54802.com|wb8017com|5566555.com|www.3535.com|www.746msc.com|www.9789f.com|www.p7790.com|zd7606com|www.4445004.com|pj9618com|www22sblivecom|wwwpj7840com|59596h.com|WWW.8510.COM|wpf518518|ruanjianbzcom|24nnnn.com|tansiyang|yemao523最新地址|gn8.mxm|817296com|wwwed33com|y88888|5241com|www945500com|539099.com|www.155283.com|jili9958.com|www11110com|www7276660com|83811x|fff133|789176.com|httpwwwhs074comm|game.my0511.com|778899bbb|www4445524com|passion1985|www811232com|tlc148.com|225445254|68228x|www.25856n.com|http://www.9177.com/|www.iuhecai.cc|wwwlet98com|www.un1155.com|171270818|www.pj947.com|bet6239com|6605ggcom|pj56888.com|www.w7664.com|www.998994.com|www.vns0515.com|yaoji2.cc|wwwgk000com|519tu|www.551103.com|www.13777.com|delenff@126.com|2824x.net|cs1101|bkm990199029903@163.com|jh0111.com|ag7741com|www.520hei.com|www.96096010.com|www.76799.com|www.yh88.com|bet6200com|wwwpj6622com|www.2555ppp.com|www.784n|sb039|nowmimi.com|1422.com|0775drf.com|wb8886com|1322.com|lxf11|vns8577com|www99tvcom|WWWyinghuang00com|hg8554com|0952bet|www.981788.com|wwwhk513com|www.blg020.com|www.kc8kc6.com|www.tyc689.com|60uuu.net|www.ag.22ff163.com|www.dafa0013.com|ww269chinacom|m.kf8805.com|www0505wwcom|wwwbm9992com|www.8516789.com|www.55666ktv.com|018618.com|www.849999.com|http/04544com|hg00218.cc|sunbin|www.lhg1188.com|www.sao.1122.com|wwwhaole03com|wwwhg3282com|wwwjs07658com|833598com|liu3212780|eee258258|588008com|www.xpj55345.com|www.2223511.com|www55951ccom|ag5851com|www.883509.com|3650010.com|www.hggj5588.com|wwwss7158com|sihaimeng|b119pt.com|www.wd679.com|cjun520111|andong|wxc440com|h8vipcom|www388739com|www2djcc|wwwdj520net|tk26.com|99800bjlcom|www18807com|www.886000.cc|hg5867com|www3355453com|6398qq|zyp1122|www.zxc07.com|www4107rcom|www.362658.com|88841.com|wangyc|c886125|wwwu66983com|www.138557.com|https://gangbangpornfree|dan1983|www.vns231.com|www.9e.com|www.b0028.com|yy91|www.hg2218.com|

402i1|www.11aaa.com|5858|www584899com|zunyi168.com|www.520hhxx.com|www.yh07w.com|47kvkv. com|amxj2288.com|bc822.com|www5542dcom|www.y7y4|yeqingsong|www847722com|da77777.com|hg00389.com|www.8335855.com|qxh888888|wwwds766com|www.ddsoso.com|www.xpj406.com|www.725563.com|www.zy1155.com|www.macao558.com|www.838.cn|WWW.PT3454.COM|www.mt00001.conm|www.3764.COM|1886yyy|www.186777.com|manx259.com|kuozi368|31456.com|www14yscom|by6681. com|www.7liao.com|wwwjs34466com|www.8807jj.com|www.686dl.com|2542352584@qq.com|qy3538com|www.ii77456.com|xrjnsbc.com|WWW.4628.COM|WWW.11478.COM|www.bet0907.com|wwwvns3628com|www.jing6661.com|4866b80|sb57xnet|www.sp90.com|yzxxoo|www.6657.com|www.89pao.com|57111com|msc2013.com|www.zucai310.com|www.258hhh.com|www152789com|500791.com|www.yth63.com|www66827jcom|936677com|ww11441|737399.com|xinhao02com|www.b6518.com|www.222333f.com|888508.com|v72555.com|277663.com|73338xcom|5959fff.com|www31365ggcom|wwwihao189com|www.493333.com|90633in|wwwh6555com|www.46255.com|www.7574999.com|WWW.499SZ.COM|www.1124q.com|shl752|035960.com|www88235com|www.hnjxxx.com|www.94luyilu.com|www.6044.com|www.8263819.com|www.hy279.com|wwwby.1318com|yujin88|cp3505com|www.494847.com|wwwylg73com|www.bet99.com|惠娜8722fa38|zhanjianwei|www.687.cc|5886rr.com|k4488.com|13503za|wwwjwcp1com|wwwhy324com|www.xfmmz.com|lulie|www.tlc190com.com|www363115com|1ddddd.com|wwwhg6821com|se53se.net|808xpj.com|m.csh888.com|www.1495t.com|4866b50|www.458458.net|www.kk800.com|www.js0080.com|hh9696|39695.com|243y50com|www.savk16.com|www.d88811.com|ctongyanhui|wwwd5org|WWW,58580,COm|WWW.BX8886.COM|ag6593com|hg00467.cc|www77608com|wwwampj66com|9608068.com|ai1472991999|www.yh88687.com|www.8455.com|p99199.com|k1299com|www.19444o.com|www.89488.com|wss102|822383com|www.id.mi|6633vns|fun605|522av|lin0000000|www hav 666.com|w26055.vip|www6696cc|www.vagaa.com|www.jinsha74.com|865.net|www.45944.com|www.cc4625.com|www.5845.com|119060com|www2288GGCOM|131hh.com|ag1463com|wwwbm2350com|www.95kkb.cim|www656262com|winghua85|www.tvye8.com|www796659com|4400xx.com|dudu|www.5060lu.com|

www.66xoxo.com|www541jscc|www.jr555.com|111ss9.com|Www111aa|172172k|rapftonyscott@sina.com|amvip272|4455nj|gx211.com|www.qm6lz|se99se新地址 视频观看|www.68323209.com|www.54256.com|www.6998.com|885568.com|lqq218|www.bg721.com|dongbula.cn|wyn2com|www.16889889.com|https://driver6.icu/?utm_source=|www.932321.com|www8f789com|www.yd8989.com|2626pp.com|tyy0602|www.tw2468.com|www8099577com|www4026com|m.hy66666.com|www.mgm006.com|www.kkk68.com|ks2061.vip|www.2se2se.com|lqz555com|ag6755.win|2566q6com|4567m|www.0833.cm|caopron永久发布地址|302.cm|895402|www7341144com|ag5415com|sese9797|www156788com|nba赛事直播网址hg8475。C0 m丿|www.17311.com|guli123|senb20.com|www.hgbet44.com|ag9332vip|21372228.com|weu128|326246.com|wb4034com|www.026qq.com|a609609.com|www43055com|www7817mcom|www.mye-shop.ru|www.sa339.com|WWW.NY0055.COM|沁水吧.百度贴吧|www.41722.com|6536508com|www.hg4331.com|www33288icom|wwwyh45678com|www.k6142.com|c123nnn|78776e|www66602com|http://web.jinmayi5588.com:2015|www.8tbet.com|www.5475f.net|www.594882.com|www.haole003.com|天天CAo|hg0452.com|247876com|176ks.net|ag0438.win|wwwvns781com|wufan|www.557158.com|8901mcom|www778801com|www.4976.com|www.1333988.com|wwanliyi|js20080.com|www2737zcom|974721425|www.ts7777.net|ttt502com|a3898611|liliy|ag.zuan8866.com|www9979978.com|v61654|8d228.com|7hhggg.com/intr/2638ce2be69145eb|www90811com|kf338.com|tk8888|bm1213|www.668btt.net|04000.com|www.55331s.com|www.bet708.com|76566.com|wwwam11688com|shenjianzhon|九九 365385.com|29933vcom|www6216bbcom|www9999.k8.com|meimeidy net|zlh007.com|www.39939net|www2288137com|02296com|pj99t.com|duwendong|bj841con樱桃|js1369com|www.9581.com|yw80606.com|wwwhg2107com|roonent@163.com|qyy2177com|whm188|WWW114486com|690222com|www628833com|wzwsad00|www.hg5987.com|6000hgcom|www.057058.com|406834256@qq.com|www.612.tlcom|qqapple|www.mgm107.com|www.188w.com|帐号|www7664xcom|www.bet7707.net|wwwy5559com|0177qcom|www.hg2557.com|yb5022com|www.toejamsoftware.com|www.pj7379.com|menghua55|mg117.com|367711.com|4138|www.666nv.com|221478|WWW.88KK.INF777KK.INFO|zxc44|860913com|www.17088.com|cf876|dd2212|czfhtedggdd|

以上会员名单排名不分前后