2log5(25)-3log2(64)
问题描述:
2log5(25)-3log2(64)
如题`怎么做?
答
2log5(25)-3log2(64)
=2log5(5^2)-3log2(2^6)
=2*2log5(5)-3*6log2(2)
=4*1-18*1
=-14