log3 25×log2 27×log5 2^-3=_____

问题描述:

log3 25×log2 27×log5 2^-3=_____

log3 25×log2 27×log5 2^-3
=(2lg5/lg3)(3lg3/lg2)(-3lg2/lg5)
=2*3*(-3)
=-18