求值 log【9(下标)】3+log【 9(下标)】27 log【2】(1/2)- log【1/2】2
问题描述:
求值 log【9(下标)】3+log【 9(下标)】27 log【2】(1/2)- log【1/2】2
答
log9(3)+log 9(27)
=1/2+3/2
=2
log2(1/2)- log1/2(2)
=-1-(-1)
=0