2log5 10+log5 0.25-3log2 64 急死了!
问题描述:
2log5 10+log5 0.25-3log2 64 急死了!
答
2log5 10+log5 0.25-3log2 64
=log5 100+log5 0.25-3×6
=log5(100×0.25)-18
=2-18
=-16