=5^1÷5^log0.2(3)
=5÷0.2^-log0.2(3)
=5÷0.2^log0.2(3^-1)
=5÷0.2^log0.2(1/3)
=5÷1/3
=15
换底公式
=(lg3/lg4)(lg2/lg9)-lg32^(1/4)/lg(1/2)
=(lg3/2lg2)(lg2/2lg3)-lg2^(5/4)/(-lg2)
=(1/2*1/2)(lg3/lg2)(lg2/lg3)+(5/4)lg2/lg2
=1/4+5/4
=3/2
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024