已知lg2=0.3010,lg3=0.4771,求lg75的值

问题描述:

已知lg2=0.3010,lg3=0.4771,求lg75的值

已知lg2=0.3010,lg3=0.4771,
lg75
=lg3+2lg5
=lg3+2-2lg2
=0.4771+2-3x0.3010
=1.5741