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当前位置:首页 > 中学教育 > 高中教育 > 全国体育单招专题复习:指数对数的运算含答案
全国体育单招专题复习指数对数的运算一、选择题1.计算122[(2)]的值为()A.2B.2C.22D.222.下列各个表达式中,正确的个数是()①5553223②49)23()32(22③0(tan603)1④3232322nmnm(A)1(B)2(C)3(D)43.以下化简结果正确的是()①22log8log)28(log222②32log8log)28(log222③14log8log48log222④22log8log2log8log2222⑤4)8(log)2(log)]8)(2[(log222A、①④⑤B、③④C、③D、全正确4.以下化简结果错误的是()①21001log10②233log33③)3(021log2logaaa④32log18log33⑤225log41log1010⑥225.0log10log255A、④B、⑤C、⑥D、全错二、填空题5、化简63231.5126、化简1213221111xxxx=7.若4164x,则x=_______,若x22132,则x=________,若313)25()52(xx,则x=________.8.化简100011343460022lg.lglglglg.=__________.三、计算题9.化简2)2(lg20lg5lg8lg325lg210.化简24525log5+log0.2log2+log0.511.若m27log4,n25log3,请用,mn表示lg2。12.解方程1)1(log)2(log21221xxx参考答案一、选择题1.C2.A3.C4.A二、填空题5、6;6、x-1;7.13,23,1;8.6。三、计算题9.化简121312011(0.027)()36(30.75)(10)3解:原式=1013623333639131310.化简:3131323232313132bababbaaba解:原式11111121123333333333112112333333111133331111333313()()()()()()()()()()()()()()2ababababaabbabaabbabababababababb11.化简22)2(lg20lg5lg8lg325lg解:原式222222lg52lg2lg5(lg45)(lg2)2(lg5lg2)lg5(2lg2lg5)(lg2)22lg5lg2(lg5)(lg2)2(lg2lg5)312.24525log5+log0.2log2+log0.5解:原式=4425251log25+log0.2log4+log2425log5log2lg5lg2lg4lg25lg5lg22lg22lg51413.若m27log4,n25log3,请用,mn表示lg2。解:显然3lg32lg5(1),(2)2lg2lg3mn;(1)(2)得3lg53(1lg2)lg2lg2mn解之得3lg23mn。14.解方程1)1(log)2(log21221xxx解:)1(2log)2(log21221xxx即0102)1(2222xxxxxx解之得3x。
本文标题:全国体育单招专题复习:指数对数的运算含答案
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