高考网对数(一)班级学号姓名目标要点:理解对数、常用对数及自然对数的概念,掌握指数式与对数式的关系及对数恒等式一、基础练习1、写出对数的定义____________________________________________________________________________________________________________________________________2、对数式Nalog中,a的取值范围是______________,N的取值范围是____________3、1loga________aalog_________aa1log_______aa1log_______Naalog________(0a且1a)10log22______3log122_________4、常用对数的底数是_______,正数N的常用对数表示为___________;自然对数的底数是_________,正数N的自然对数表示为___________________。5、⑴把下列指数式写成对数式:164x_____________13x_________________2510x______________6xe_________________⑵写出下列各式的值)10000lg(_________)00001.0lg(__________)10lg(lg_________)10ln(lg__________)lg(lne_____________100lg2__________二、能力培养6、⑴若218logx,则x_______⑵若x)223(log12,则x_________⑶若1)1(log3a,则)1(loglog22aa_________⑷若2logxa,3logxb,6logxc,则xabclog____________7、若ma2log,na3log,则nma32_______________8、若255lgx,则x________若7782.06lg,则7782.210___________9、在对数式)183(log22xxx中,实数x的取值范围是_____________________浙师大附中同步作业《数学第一册上》编写:蒋淑飞高考网、如果1)(loglog)(loglog5354ba,求ba的值11、求下列各式的值①5log12212②2log39③125log23255三、综合拓展12、求满足1log1yx的x、y的关系式,并画出图象。13、设}1,0{M,},2,lg,11{aaaNa,是否存在a的值,使M∩}1{N