对数运算练习题 1.将下列指数式改为对数式: 1(1)16_________________ (2)814x__________________ 4232.将下列对数式改为指数式: (1)log483.3log33___________________ (2)log1x5______________ 42371log3log34log349___________ 24214.logaxlogam2loganlogap,则x___________ 25.lg0.06lg622lg61_____________ 6.下列指数式与对数式互化不正确的一组是 ( ) A 101与lg10 B 2712013111与log27 3331C log392与93 D log551与55 7.已知logx162,则x的值为 ( ) A 4 B 4 C 4 D 1 428.下列各等式中,正确运用对数运算性质的是 ( ) 1C lgxyz2lgxlgy2lgz D lgxyz2lgxlgylgz 22222A lgxyzlgxlgylgz B lgxyzlgxlgy2lgz 29.以下运算中结果正确的是 ( ) A log102log1051 B 3log461log42 log43211C log52lgxlgy2lgz D log283log2833 3510.已知alog32,那么log382log36,用a表示是 ( ) A a2 B 5a2 C 3a1a D 3aa1 2211.计算: 11lg9lg24022(1)lg4lg5lg20lg5 (2) 2361lg27lg352xy12.已知loga2x,loga3y,求a的值 13.设在海拔x米处的大气压强是yPa,已知yce,其中c,k为常数,若沿海某地元旦那天,在海平面的大气压强为1.0110Pa,100米高空的大气压强是0.9010Pa,求8000米高空的大气压强(结果保留4为有效数字) 答案:1.(1)log1162 (2)log81x4kx553 412.(1)48 (2)x 23. 3 4.345m 5.1 n2p6.C 7.B 8.D 9.A 10.A 11.(1)2 (2)1 12. 12 13.4.01510Pa 4 本文来源:https://www.wddqw.com/doc/457ae4a9caaedd3382c4d3cd.html