Question

刚学对数计算有点懵,1）9^(0.5 - 5log3)2) log5^35 + 2log(0.5)^√2 - log5^

Answer 1

前4道道题有问题 形如5log3没有底数

5 lg 0.6 = a a=ig2+ig3 +ig0.1 =ig2+ig3 -1 b=ig0.1 +lg9 =2 ig3-1

lg5^4=4lg5=4(1-lg2)=a-b/2-3/2