2lg3+lg7+lg(25/7)-lg(9/4)+lg1
1题 (lg根号2+lg3-lg根号10)/lg1.8
【根号(lg3的平方-lg9+1)*(lg根号27+lg8-lg根号1000)】/(lg0.3)*(lg1.2)
2lg(5/3)-lg(7/4)+2lg3+(1/2)lg49
急(lg根号下27+lg8-lg根号下1000)\lg1.2=(3/2lg3+3lg2-3/2)/lg1.2然后呢
(lg根号27+lg8-lg根号1000)/lg1、2
(lg√27+lg8-3lg√10)/lg1.2
根号下{(lg3)平方-lg9+1}乘以(lg根号下27+lg8-lg根号下1000)再整体除以lg0.3乘以lg1.2
(lg根号2的对数+lg3的对数—lg根号10的对数)除以lg1.8的对数 该如何运算?
方程lg(4^x+2)=lg2^x+lg3^x
1/2lg(x-3)+lg根号4x+1=lg2+1/2lg3
(lgx)/(lg1/2)=lg(x)/-(lg2)=-(lg(x)/lg(2))=-log2(x)
化简:(1)4lg2+3lg5-lg五分之一,(2)(lg根号下27+lg8-lg根号下1000)比上(lg1.2)