log底数8真数3=lg3/lg8=p
log底数3真数5=lg5/lg3=q 相乘
lg5/lg8=pq
lg5/3lg2=pq
lg5/lg2=3pq lg2=1-lg5
lg5=3pq-3pqlg5
lg5=3pq/(1+3pq)
请参考……lg5=3pq-3pqlg5如何得到下面的lg5=3pq/(1+3pq)移项lg5+3pqlg5=3pqlg5(1+3pq)=3pq得到下面的lg5=3pq/(1+3pq)